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Littérature scientifique sur le sujet « Basalt plains »

Auteur : Grafiati
Publié le 10 janvier 2023
Mis à jour le 29 janvier 2023

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Articles de revues sur le sujet "Basalt plains"

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Sinclair, Steve, Geordie Scott‐Walker, Khorloo Batpurev, John W. Morgan, Karl Just et Damien Cook. « The forgotten annual forbs of Victoria’s basalt plains grassland ». Ecological Management & ; Restoration 22, no 2 (mai 2021) : 126–33. http://dx.doi.org/10.1111/emr.12480.

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Gibson-Roy, Paul, John Delpratt et Greg Moore. « Restoring Western (Basalt) Plains grassland. 2. Field emergence, establishment and recruitment following direct seeding ». Ecological Management & ; Restoration 8, no 2 (août 2007) : 123–32. http://dx.doi.org/10.1111/j.1442-8903.2007.00349.x.

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Young, Cyanne, Hervé Fritz, Erica AH Smithwick et Jan A. Venter. « Patch-scale selection patterns of grazing herbivores in the central basalt plains of Kruger National Park ». African Journal of Range & ; Forage Science 37, no 3 (29 juin 2020) : 199–213. http://dx.doi.org/10.2989/10220119.2020.1733084.

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Kutt, A. S., G. Coulson et J. Wainer. « Diet of the Striped Legless LizardDelma impar(Squamata : pygopodidae) in a western (basalt) plains grassland, Victoria ». Australian Zoologist 30, no 4 (avril 1998) : 412–18. http://dx.doi.org/10.7882/az.1998.007.

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Young, Cyanne, Hervé Fritz, Erica A. H. Smithwick et Jan A. Venter. « The landscape-scale drivers of herbivore assemblage distribution on the central basalt plains of Kruger National Park ». Journal of Tropical Ecology 36, no 1 (23 décembre 2019) : 13–28. http://dx.doi.org/10.1017/s0266467419000312.

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AbstractThe distribution and abundance of herbivores in African savannas are constrained by interactions between abiotic and biotic factors. At the species-level, herbivores face trade-offs among foraging requirements, vegetation structure and the availability of surface water that change over spatial and temporal scales. Characterizing herbivore requirements is necessary for the management of the environment in which they occur, as conservation management interventions such as fencing and artificial water provision consequently have effects on how herbivores address these trade-offs. We tested the effects of environmental attributes on the probability of presence of herbivore functional types at different distances to water in the Satara section of Kruger National Park over the period of a year. Hypotheses about species’ relative distribution and abundance were developed through a literature review of forage and water availability constraints on feeding preference and body size of herbivore. We expected strong seasonal relationships between vegetation biomass and quality, and biomass of water-dependent herbivores with increasing distance to water. Our analyses of herbivore distribution across the region confirmed broad-scale descriptions of interactions between forage requirements and water availability across a set of species which differ in functional traits.
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Hausrath, Elisabeth M., Alexis K. Navarre-Sitchler, Peter B. Sak, Carl I. Steefel et Susan L. Brantley. « Basalt weathering rates on Earth and the duration of liquid water on the plains of Gusev Crater, Mars ». Geology 36, no 1 (2008) : 67. http://dx.doi.org/10.1130/g24238a.1.

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Yen, Alan L., et Amanda J. Kobelt. « The composition and seasonal changes in the beetle (Coleoptera) fauna of the western Victorian basalt plains native grasslands ». Proceedings of the Royal Society of Victoria 121, no 2 (2009) : 228. http://dx.doi.org/10.1071/rs09228.

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The western Victorian basalt plains native grasslands are recognised as one of the most endangered plant communities in Australia. Since European settlement, they have been cleared, grazed, and fragmented and are now found as small scattered remnants. No general invertebrate surveys were undertaken in these grasslands until the 1990s, and this paper reports on the beetles associated with 12 native grassland sites that were sampled seasonally between 1992 and 1993. A total of 114 beetle morphospecies from 26 families were collected, dominated by members of four families (Carabidae, Staphylinidae, Scarabaeidae and Tenebrionidae). The beetle fauna comprised a small number of widespread species and over 63% of species were found at only one or two sites. In terms of relative abundances, a small number of beetle species dominated the fauna; the 10 most common species comprised nearly 64% of the total number of individuals collected.
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Morris, R. V., G. Klingelhöfer, C. Schröder, D. S. Rodionov, A. Yen, D. W. Ming, P. A. de Souza et al. « Mössbauer mineralogy of rock, soil, and dust at Gusev crater, Mars : Spirit's journey through weakly altered olivine basalt on the plains and pervasively altered basalt in the Columbia Hills ». Journal of Geophysical Research : Planets 111, E2 (février 2006) : n/a. http://dx.doi.org/10.1029/2005je002584.

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Sarker, Md Nuruddin. « Gravel Deposits Of Dauki-Piyain River Bed And Surrounding Flood Plains : A Case Study ». Journal of the Asiatic Society of Bangladesh, Science 41, no 2 (30 décembre 2015) : 225–32. http://dx.doi.org/10.3329/jasbs.v41i2.46206.

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The Dauki-Piyain river is the major source of gravels in Jaflong area which is located on the alluvial plain south of the Khasi-Jainta Hills. Jaflong gravels comprise quartzite, granite, gneiss, amphibolite, basalt, sandstone and conglomerate. The gravels are mostly fresh and hard and can be used as good construction materials. The deposition of gravels is controlled by the frequency and intensity of water-flow in the Dauki-Piyain river forming the Jaflong quarry. The Dauki river is constantly changing its course. Controlling the river course and keeping its tract clear from debris will make the replenishment of the gravel deposit steady. The main economic activities of the local people are mostly dependent on the gravel and sand extraction business from Jaflong quarry. It is found that about 30,00,000 cubic meters of gravel from 200 hectares areas are extracted per year from the Dauki-Piyain river of Jaflong. The average revenue collected by the Government of the People’s Republic of Bangladesh from this location stands at approximately 30.00 million taka per year. Asiat. Soc. Bangladesh, Sci. 41(2): 225-232, December 2015
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Bryant, David, Matthew J. Bruce et Steve J. Sinclair. « Observations of responses to re-introducing fire in a Basalt Plains grassland after the removal of grazing : Implications for restoration ». Ecological Management & ; Restoration 18, no 3 (19 juin 2017) : 239–45. http://dx.doi.org/10.1111/emr.12268.

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Thèses sur le sujet "Basalt plains"

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Hare, Alison (Alison Grace) 1976. « The stratigraphy and evolution of the late Cenozoic, intra-plate Werribee Plains basaltic lava flow-field, Newer Volcanic Province, Victoria, Australia ». Monash University, School of Geosciences, 2002. http://arrow.monash.edu.au/hdl/1959.1/7586.

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Sant, Christopher Joseph. « Geothermal Alteration of Basaltic Core from the Snake River Plain, Idaho ». DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1451.

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The Snake River Plain is located in the southern part of the state of Idaho. The eastern plain, on which this study focuses, is a trail of volcanics from the Yellowstone hotspot. Three exploratory geothermal wells were drilled on the Snake River Plain. This project analyzes basaltic core from the first well at Kimama, north of Burley, Idaho. The objectives of this project are to establish zones of geothermal alteration and analyze the potential for geothermal power production using sub-aquifer resources on the axial volcanic zone of the Snake River Plain. Thirty samples from 1,912 m of core were sampled and analyzed for clay content and composition using X-ray diffraction. Observations from core samples and geophysical logs are also used to establish alteration zones. Mineralogical data, geophysical log data and physical characteristics of the core suggest that the base of the Snake River Plain aquifer at the axial zone is located 960m below the surface, much deeper than previously suspected. Swelling smectite clay clogs pore spaces and reduces porosity and permeability to create a natural base to the aquifer. Increased temperatures favor the formation of smectite clay and other secondary minerals to the bottom of the hole. Below 960 m the core shows signs of alteration including color change, formation of clay, and filling of other secondary minerals in vesicles and fractured zones of the core. The smectite clay observed is Fe-rich clay that is authigenic in some places. Geothermal power generation may be feasible using a low temperature hot water geothermal system if thermal fluids can be attained near the bottom of the Kimama well. (113 pages)
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Monders, Anna Gabrielle Bogan. « Phase equilibrium investigations of the Adirondack Class basalts from the Gusev plains, Gusev crater, Mars ». Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37281.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2006.
Includes bibliographical references (leaves 48-51).
Phase equilibrium experiments have been performed on a synthetic analog of the Gusev plains basalt composition from the Spirit landing site on Mars, determined by the Alpha Particle X-ray Spectrometer on the Spirit Rover (Gellert et al., 2006; McSween et al., 2006). The near-liquidus phase relations were determined over the pressure range of 0.1 MPa to 1.5 GPa and at temperatures from 1105 °C to 1390 °C in a piston cylinder apparatus and l-atm gas mixing furnace. The composition is multiply saturated with olivine, orthopyroxene, and spinel on the liquidus at 1310 °C and 1.0 GPa, or 85 km depth on Mars, placing an upper limit constraint on the thickness of the Martian lithosphere at the time of eruption. Experiments carried out at 0.1 MPa show Fo77 olivine as the first liquidus silicate mineral, appearing near 1250 °C. Olivine and spinel co-crystallize until pigeonite and plagioclase (An73) join the crystallizing assemblage at 1125 °C. Low pressure crystallization of the Gusev composition does not produce liquids that could be parental magmas to surface types 1 and 2 of the Martian surface, nor do they appear to be related to olivine-phyric shergottites or other SNC meteorites. The iron-rich Gusev basalts appear to have been crystallized from a less depleted mantle source than the magnesian olivine-phyric shergottite Yamoto 980459.
by Anna Gabrielle Bogan Monders.
S.M.
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Fortin, Véronique. « Étude de la régénération de la membrane basilaire au cours de la guérison de plaies cutanées humaines ». Thesis, Université Laval, 2005. http://www.theses.ulaval.ca/2005/22793/22793.pdf.

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La membrane basilaire est très importante dans la peau humaine. Elle permet la diffusion des nutriments des vaisseaux sanguins jusqu’à l’épiderme et elle assure une bonne jonction entre le derme et l’épiderme. Durant la guérison, les kératinocytes de l’épiderme migrent sur le derme et synthétisent les différents composants nécessaires à la formation d’une membrane basilaire fonctionnelle. L’objectif de cette étude est d’analyser la régénération de la membrane basilaire lors de la guérison de plaies cutanées. L’emphase est aussi mis sur l’expression de la laminine 5 puisqu’elle joue un rôle particulier dans la migration des kératinocytes selon qu’elle est sous sa forme longue ou courte. Les résultats obtenus montrent la reconstruction progressive d’une membrane basilaire dans une peau en cours de régénération. Ces analyses permettent de mieux comprendre les mécanismes reliés à la guérison des plaies cutanées. La compréhension de ces notions constitue la base pour une recherche plus approfondie.
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Barton, Katelyn J. « Links Between Eruptive Styles, Magmatic Evolution, and Morphology of Low-Shield Volcanoes : Snake River Plain, Idaho ». BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8612.

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In this study, connections between chemical composition, eruption style, and topographic features of two shield volcanoes on the Snake River Plain, Idaho are examined. These relationships may then be applied to understanding silicate volcanic features throughout the inner solar system. Despite their similar ages and geographic locations, two young basaltic shield volcanoes—Kimama Butte (87 Ka) and Rocky Butte (95 Ka)—have strikingly different topographic profiles. The Kimama Butte shield has a diameter of 9 km and a height of 210 m. In contrast, Rocky Butte has a broad 36 km topographic shield that rises 140 m with less than 1° slopes. The vent crater at Rocky Butte developed as a large lava blister inflated and then collapsed forming a crater in which a lava lake developed. Little spatter accumulated throughout the eruption. In contrast, high spatter mounds and spatter-fed flows flank the main summit crater at Kimama Butte. Major- and trace-element compositions of the basaltic lavas are similar at the two shields, but distinct in Ni and Al2O3. The lavas range in TiO2 concentrations from 2.6–4.5 wt.% for Kimama Butte and 2.6–4.3 wt.% for Rocky Butte. These ranges can be related to magma evolution by fractional crystallization involving plagioclase and olivine without clinopyroxene. Compositions of the pre-eruptive phenocrysts are also similar at both shields but show variation with evolution. Olivine cores in the more primitive lavas are more Mg-rich (Fo80-72) than those in the evolved rocks (Fo65-55). Plagioclase cores are similarly more calcic in the more primitive flows (An78-68) than in the evolved ones (An65-52). Like other olivine-tholeiites on the Snake River Plain, the fO2 and fH2O were probably low with fO2 at -2△QFM and 0.1 wt.% H2O. Pressure of crystallization estimated from MELTS models is less than 3 kbar (~10 km deep). Calculated temperatures and magma viscosities overlap at both Kimama Butte (1226 to1147°C and 158 to14 Pa·s) and Rocky Butte (1251 to 1145°C and 75 to 8 Pa·s). However, Kimama Butte magma viscosities extend ~80 Pa·s higher than those for Rocky Butte lavas. The higher magma viscosities are the result of higher phenocryst proportions in spatter and spatter-fed lavas concentrated near the vent. Because lava temperature, volatile content, and chemical composition overlap at the two volcanoes, they are probably not important controls of shield-volcano morphology. This suggests that steep-capped shields are not created as a simple function of having more silicic lavas. Melt viscosities are also similar, but Rocky Butte lacks the phenocryst-rich (>30 vol %), higher magma viscosity lavas and the high spatter ramparts that form the cap at Kimama Butte. Thus, we conclude that eruption style and phenocryst content play the most important role in developing a low-shield volcano summit. Where eruptions shifted from lava lake overflow and tube development to late fountaining with short spatter-fed phenocryst-rich flows, steeper, higher shields develop.
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Bradshaw, Richard W. « Mineral chemistry of basalts recovered from Hotspot Snake River Scientific Drilling Project, Idaho : Source and crystallization characteristics ». BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3359.

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Mineral chemistry and petrography of basalts from the Kimama drill core recovered by Hotspot: Snake River Scientific Drilling Project, Idaho establish crystallization conditions of these lavas. Twenty-three basalt samples, from 20 individual lava flows were sampled from the upper 1000 m (of the 1912 m drilled) core drilled on the axis of the Snake River Plain, and represent approximately 3 m.y. of volcanism (rocks at the bottom of the hole are ~6 Ma). Rock from the upper 1000 m are typically fresh, while those lower in the core are more altered and are less likely to preserve fresh phenocrysts to analyze. Intratelluric phenocrysts (pre-eruption) are: olivine, plagioclase and Cr-spinel inclusions in olivine and plagioclase; groundmass phases (post-eruption) are: olivine, plagioclase, clinopyroxene, magnetite and ilmenite. Olivine core compositions range from Fo84-68, plagioclase cores range from An80-62, clinopyroxene ranges in composition from Wo47-34, En47-28, Fs30-15, spinel inclusions are Cr (up to 20 wt % Cr2O3) and Al-rich (up to 35 wt % Al2O3) and evolve to lower concentrations of Cr and Al and higher Fe and Ti, chromian titanomagnetite to magnetite, and ilmenite are groundmass oxide phases. Thermobarometry of Kimama core basalts indicates that the phenocryst phases crystallized at temperatures of 1155 to 1255°C at depths of 7 to 17 km, which is within or near the seismically imaged mid-crustal sill. Plagioclase hygrometry suggests that these lavas are relatively anhydrous with less than 0.4 wt % H2O. Groundmass phases crystallized at lower temperatures (<1140°C) after eruption. Oxygen fugacity inferred from Fe-Ti oxide equilibria is at or just below the QFM buffer. The origin of the basaltic rocks of the Snake River Plain has been attributed to a mantle plume or to other, shallow mantle processes. Mineral and whole rock major and trace element geochemistry of the olivine tholeiites from the Kimama core are used to distinguish between these two sources (deep or shallow mantle). Whole rock compositions were corrected for plagioclase and olivine fractionation to calculate primary liquids to estimate mantle potential temperatures. Olivine phenocrysts have the pyroxenite source characteristics of low Mn and Ca, but a peridotite source characteristic of low Ni. Thus, trace element models were used to test whether there is pyroxenite in the source of the Snake River Plain basalts, as hypothesized for Hawaii and other plume-related hotspots (e.g., Sobolev et al., 2005; Herzberg, 2011). Olivine chemistry and trace element models establish that the basalt source is a spinel peridotite, not a pyroxenite. The average mantle potential temperature obtained for these samples is 1577°C, 177°C hotter than ambient mantle, suggesting that the basaltic liquids were derived from a thermal plume. Silica activity barometry shows that melt segregation occurs between 80 and 110 km depth, which is within or very near the spinel stability field, and suggests that the lithosphere has been eroded by the plume to a maximum depth of 80 km, and recent mantle tomography suggests that it may be even thinner.
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Gomero, Vásquez Luis Enrique. « Diseño de un sistema de acceso vehicular a la PUCP basado en tecnología RFID y detección de placas vehiculares ». Bachelor's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/9388.

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El desarrollo de esta tesis se centra en el rubro de los estacionamientos, particularmente al interior de la PUCP y, por ello el control de los ingresos vehiculares permitirá conocer el correcto uso de los estacionamientos y también asegurar que solo usuarios válidos puedan ingresar a la PUCP. Por ello, en este presente trabajo de tesis se plantea un sistema de acceso vehicular a la PUCP usando principalmente dos tecnologías. En ese sentido, la inclusión de nuevos avances tecnológicos permite la posibilidad de desarrollar sistemas que cumplan con un control eficiente, cumplan los estándares de seguridad establecidos y brinden un buen servicio al usuario. Entre las tecnologías empleadas para el sistema, se propuso las tarjetas RFID, que es una tecnología de identificación personal automática que incluye información auténtica del usuario y presenta lectores que permiten leer estas etiquetas a distancias. Así mismo, el uso de programas de Procesamiento Digital de Señales (DSP) como el openALPR permitirá obtener los caracteres de las placas vehiculares de los vehículos ingresantes a la universidad mediante algoritmos de procesamiento de las imágenes capturadas. Todas estas tecnologías fueron unificadas en una plataforma basada en lenguaje de programación Java mediante librerías de conexión y una interfaz final para la gestión de accesos, que sería utilizada por el personal de seguridad encargados del acceso vehicular. Mediante el diseño sistemático de los sistemas y realizando pruebas físicas, se obtuvieron resultados con errores por debajo del 7% en detección de placas vehiculares, que afirman que se puede identificar correctamente a los usuarios que ingresen a la universidad con sus respectivas tarjetas RFID y placas vehiculares e ingresarlos correctamente al sistema de base de datos para su acceso a las instalaciones de la PUCP. Por ese motivo, el sistema planteado permitirá generar un mejor control de los accesos vehiculares a la universidad.
Tesis
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Knowles, T., T. Doerge et M. Ottman. « Interpretation of Basal Stem Nitrate-N Concentrations for Improved Nitrogen Management in Irrigated Durum Wheat Production ». College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/201071.

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Attempts to characterize nitrogen (N) status of irrigated spring wheat by using basal stem nitrate - N (NO₃⁻N) tissue tests have shown contradictory results, due to the wide range of agronomic conditions existing in Arizona. Seven N fertility trials were conducted at the Maricopa and Safford Agricultural Centers over the 1985-88 crop years to examine the effects of N rate, N fertilizer form, residual soil N, soil texture and contrasting varieties on basal stem NO₃⁻N concentrations, yield and quality of irrigated durum wheat. Fertilizer N treatments were broadcast at planting then at the 5-6 leaf, boot and anthesis growth stages to simulate fertigation in conjunction with the first four basin irrigation events. Stem tissue samples were taken from all plots at the 3-4 leaf 5-6 leaf joint, boot and anthesis growth stages for NO₃⁻N analysis with a nitrate electrode. Diagnostic levels for durum wheat basal stem tissue NO₃⁻N tests at these growth stages are presented.
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Wei, Liping. « Impacts des caractéristiques du peuplement et des cloisonnements sur la biodiversité floristique en forêt de plaine ». Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2024/document.

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Le maintien ou l'amélioration de la biodiversité est un des objectifs importants de la gestion forestière durable. La flore du sous-bois, qui représente la partie la plus diversifiée de la flore dans les forêts tempérées, joue des rôles écologiques importants. Pourtant, elle pourrait être impactée par l'augmentation de la mécanisation de la gestion forestière. A l'échelle de la parcelle, nous avons étudié en forêt de Montargis les effets simples et combinés de caractéristiques du peuplement et de la surface en cloisonnement sur la diversité floristique du sous-bois (richesse et abondance). Les caractéristiques du peuplement (type de peuplement ou surface terrière des essences à étaient les meilleurs indicateurs de la diversité du sous-bois. La surface des cloisonnements avait un effet négligeable. A plus petite échelle – à l’intérieur du cloisonnement – nous avons étudié la réponse statistique de la diversité du sous-bois à la position dans ou hors du cloisonnement, à des facteurs micro-environnementaux (humidité du sol, compaction du sol, lumière) et aux caractéristiques du peuplement. A cette échelle, les meilleurs modèles incluaient pour les groupes écologiques la position par rapport au cloisonnement, l’humidité du sol et/ou la compaction du sol, selon le groupe écologique considéré. Au niveau espèce, la position par rapport au cloisonnement était le facteur dominant. Globalement, les cloisonnements avaient soit pas d’effet soit un impact positif sur la diversité floristique de sous-bois. Ces résultats ont dépendants du contexte écologique et historique de la forêt de Montargis. L’utilisation d’engins plus lourds ou des passages répétés sur une plus longue période pourraient changer ces conclusions
Maintaining or improving biodiversity is an important goal of sustainable forest management.Ground flora, which is responsible for most floristic diversity in temperate forests, plays multiple important roles in biodiversity but may be impacted by the increasing mechanisation of forest practices. At stand scale, we investigated in Montargis forest the individual and combined effects of tree stand attributes and skid trail area on ground flora diversity. Tree stand attributes (stand type or basal area) were the best indicators of ground flora diversity, depending on the successional traits or light preference of the species group. The effects of skid trail area were negligible. At finer scale, we studied plant response to skid trail disturbance (represented by subplot on and off skid trails), micro-environmental factors (soil moisture, soil compaction, light) and stand attribute (stand type, basal area). The best models for ecological groups included subplot location, soil moisture or soil compaction, depending on which ecological groups (classified by life form, seed bank persistence, light and moisture requirements) the species belonged to. Stand type as a covariate played a significantly important role in fine-scale diversity pattern. Subplot location was the dominant factor at species level. In conclusion, skid trails had either no impact or a positive impact on ground flora diversity. These results are dependent on the context of Montargis forest (ecological and historical), especially that mechanized harvesting is relatively recent. The employment of heavier machines and increased number of passages is likely to happen. This might induce greater soil compaction and negative effects on plant
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Nahhas, Tamar. « Materials and thermal storage systems by sensible heat for thermodynamic electro-solar plants ». Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0027.

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L'énergie solaire est connue pour sa nature intermittente par rapport aux ressources d’énergie fossile. Cette observation souligne la nécessité d'utilisation d’un système de stockage d'énergie thermique. Le système de stockage thermocline est considéré comme un système de stockage rentable. La présente thèse vise à étudier le potentiel des roches basaltiques et siliceuses comme des candidates matériaux de stockage pour les centrales solaires concentrées. Les études expérimentales des propriétés thermo-physiques et thermomécaniques de ces roches à des températures allant jusqu'à 1000°C montrent que ces roches offrent de bonnes propriétés thermiques par rapport aux matériaux classiques de stockage. L'analyse du système de stockage thermocline sur un lit de roches à air direct est réalisée par une approche numérique. En outre, cette recherche vise également à évaluer l’impact environnementale de ce type de système de stockage en effectuant une analyse comparative de son cycle de vie. Enfin, une étude complémentaire réalisée dans le but de produire une carte d'indice de pertinence a permis d’identifier les zones les plus appropriées pour la construction des centrales solaires en Egypte. L'originalité de cette approche alternative pour le stockage d'énergie thermique est qu’elle combine la performance et la disponibilité des matériaux de stockage tout en réduisant leurs impacts environnementaux et financiers
Compare to fossil fuel energy resources, solar energy is known for its intermittent nature. This observation highlights the need for the use of a thermal energy storage system. The thermocline storage system is considered as a cost-effective storage system. This thesis aims to study the potential of basalt and silex rocks as candidate storage materials for concentrated solar power plants. Experimental studies of the thermo-physical and thermo-mechanical properties of these rocks at temperatures up to 1000°C show that these rocks offer good thermal properties compared with conventional storage materials. The analysis of the thermocline storage system of air rock-packed bed is carried out using a numerical approach. This research also aims to assess the environmental impact of this type of storage system by conducting a comparative analysis of its life cycle. Finally, a complementary study carried out with the aim of producing a relevance index map made it possible to identify the most suitable areas for the construction of solar power plants in Egypt. The originality of this alternative approach for thermal energy storage is that it combines the performance and availability of storage materials while reducing their environmental and financial impacts
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Livres sur le sujet "Basalt plains"

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Anderson, S. R. Stratigraphy of the unsaturated zone and uppermost part of the Snake River Plain aquifer at Test Area North, Idaho National Engineering Laboratory, Idaho. Idaho Falls, Idaho : U.S. Dept. of the Interior, U.S. Geological Survey, 1991.

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Anderson, S. R. Stratigraphy of the unsaturated zone and uppermost part of the Snake River Plain aquifer at test area north, Idaho National Engineering Laboratory, Idaho. Idaho Falls, Idaho : U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Anderson, S. R. Stratigraphy of the unsaturated zone and uppermost part of the Snake River Plain aquifer at the Idaho Chemical Processing Plant and Test Reactors Area, Idaho National Engineering Laboratory, Idaho. Idaho Falls, Idaho : U.S. Dept. of the Interior, U.S. Geological Survey, 1991.

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Die Struktur der Vegetation auf periglazialen Basaltblockhalden des Hessischen Berglandes : Bryophytenvegetation und Waldgesellschaften, Morphologisch-anatomische Merkmale, Fortpflanzungs- und Ausbreitungsbiologie. Berlin : J. Cramer, 1991.

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Museum, Panhandle-Plains Historical. Masterpieces of native American basketry : Panhandle-Plains Historical Museum, June 15th to August 3rd, 1986. Canyon, TX : Panhandle-Plains Historical Museum, 1986.

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Phipps, Richard L. Computer programs to calculate basal area increment from tree rings. Reston, Va : Dept. of the Interior, U.S. Geological Survey, 1989.

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Black ash baskets. Mechanicsburg, PA : Stackpole Books, 2011.

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Baskets from nature's bounty. Loveland, CO : Interweave Press, 1991.

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Gayle, Fioravanti Linda, dir. From vines to vessels : A vine gatherer's handbook, identification, collection, preparation. 2e éd. Johnson City, Tenn : Overmountain Press, 1987.

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Dybkjær, Karen. Palynological zonation and palynofacies investigation of the Fjerritslev Formation (Lower Jurassic-basal Middle Jurassic) in the Danish Subbasin. København : Danmarks geologiske undersøgelse, 1991.

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Chapitres de livres sur le sujet "Basalt plains"

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Jürgens, Gerd, Ramón A. Torres Ruiz, Thomas Laux, Ulrike Mayer et Thomas Berleth. « Early Events in Apical-basal Pattern Formation in Arabidopsis ». Dans Plant Molecular Biology, 95–103. Berlin, Heidelberg : Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78852-9_10.

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Pankewitz, Lisa, Laryssa Abdala, Aadarsh Bussooa et Hermenegild Arevalo. « A Pipeline for Automated Coordinate Assignment in Anatomically Accurate Biventricular Models ». Dans Computational Physiology, 1–11. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-05164-7_1.

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AbstractThere is an increased interest, in the field of cardiac modeling, for an improved coordinate system that can consistently describe local position within a heart geometry across various distinct geometries. A newly designed coordinate system, Cobiveco, meets these requirements. However, it assumes the use of biventricular models with a flat base, ignoring important cardiac structures. Therefore, we extended the scope of this state-of-the-art biventricular coordinate system to work with various heart geometries which include basal cardiac structures that were previously unaccounted for in Cobiveco. First, we implemented a semi-automated input surface assignment for increased accessibility and reproducibility of assigned coordinates. Then, we extended the coordinate system to handle more anatomically accurate biventricular models including the valve planes, which are of great interest when modeling diseases that manifest themselves in the basal area. Furthermore, we added the functionality of mapping vector data, such as myocardial fiber orientations, which are crucial for replicating the anisotropic electrical propagation in cardiac tissue.
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Kimoto, T., H. Yano, Y. Negoro, K. Hashimoto et H. Matsunami. « Epitaxial Growth and Device Processing of SiC on Non-Basal Planes ». Dans Silicon Carbide, 711–33. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18870-1_30.

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Ton, Jurriaan, Corné M. J. Pieterse et L. C. Van Loon. « The Relationship Between Basal and Induced Resistance in Arabidopsis ». Dans Multigenic and Induced Systemic Resistance in Plants, 197–224. Boston, MA : Springer US, 2006. http://dx.doi.org/10.1007/0-387-23266-4_9.

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Morgan, Lisa A., et William R. Hackett. « Explosive basaltic and rhyolitic volcanism of the eastern Snake River Plain ». Dans Snake River Plain-Yellowstone Volcanic Province : Jackson, Wyoming to Boise, Idaho July 21–29, 1989, 38–47. Washington, D. C. : American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft305p0038.

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Vassilev, Vassil, Paola Lavermicocca, Domenico Digiorgio et Nicola Iacobellis. « Syringomycins and syringopeptins in the Basal Glume Rot of Wheat Incited by Pseudomonas syringae pv. atrofaciens ». Dans Developments in Plant Pathology, 210–14. Dordrecht : Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5472-7_38.

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Hosseyni, N., A. Ozan et Z. Kaya. « Basal Nutrient and Hormonal Requirements for Direct Organogenesis of Cedrus Libani A. Rich ». Dans Plant Biotechnology and In Vitro Biology in the 21st Century, 53–56. Dordrecht : Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4661-6_12.

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Li, Jiehua, Fredrik S. Hage, Ali Gholinia, Pan Xie, Yu Zhang, Yujuan Wu, Liming Peng, Sarah J. Haigh, Quentin M. Ramasse et Peter Schumacher. « Co-precipitation on the Basal and Prismatic Planes in Mg–Gd–Ag–Zr Alloy Subjected to Over-Ageing ». Dans Magnesium Technology 2018, 379–83. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72332-7_59.

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Sundström, Erik, et Michael Keane. « Root architecture, early development and basal sweep in containerized and bare-rooted Douglas fir (Pseudotsuga menziesii) ». Dans The Supporting Roots of Trees and Woody Plants : Form, Function and Physiology, 83–96. Dordrecht : Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-3469-1_8.

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Cahoon†, Emily B., Martin J. Streck† et Mark Ferns†. « Flood basalts, rhyolites, and subsequent volcanism of the Columbia River magmatic province in eastern Oregon, USA ». Dans From Terranes to Terrains : Geologic Field Guides on the Construction and Destruction of the Pacific Northwest, 301–52. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.0062(08).

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ABSTRACT The Miocene Columbia River Basalt Group (CRBG) is the youngest and smallest continental flood basalt province on Earth. This flood basalt province is a succession of compositionally diverse volcanic rocks that record the passage of the Yellowstone plume beneath eastern Oregon. The compositionally and texturally varied suite of volcanic rocks are considered part of the La Grande–Owyhee eruptive axis (LOEA), an ~300-km-long, north-northwest–trending, Middle Miocene to Pliocene volcanic belt that extends along the eastern margin of the Columbia River flood basalt province. Volcanic rocks erupted from and preserved within the LOEA form an important regional stratigraphic link between the flood basalt–dominated Columbia Plateau to the north, the north and bimodal basalt-rhyolite volcanic fields of the Snake River Plain to the east, the Owyhee Plateau to the south, and the High Lava Plains to the south and east; the latter two have time transgressive rhyolite centers that young to the east and west, respectively. This field-trip guide details a four-day geologic excursion that will explore the stratigraphic and geochemical relationships among mafic rocks of the CRBG and coeval and compositionally diverse silicic rocks associated with the early trace of the Yellowstone plume and High Lava Plains in eastern Oregon. The trip on Day 1 begins in Portland then traverses across the western axis of the Blue Mountains, highlighting exposures of the widespread, Middle Miocene Dinner Creek Welded Tuff and aspects of the Picture Gorge Basalt lava flows and northwest-striking feeder dikes situated in the central part of the CRBG province. Travel on Day 2 progresses eastward toward the eastern margin of the LOEA, examining a transition linking the Columbia River Basalt province with a northwestward-younging magmatic trend of silicic volcanism of the High Lava Plains in eastern Oregon. Initial field stops on Day 2 focus on the volcanic stratigraphy northeast of the town of Burns, which includes regionally extensive Middle to Late Miocene ash-flow tuffs and lava flows assigned to the Strawberry Volcanics. Subsequent stops on Day 2 examine key outcrops demonstrating the intercalated nature of Middle Miocene tholeiitic CRBG flood basalts, temporally coeval prominent ash-flow tuffs, and “Snake River–type” large-volume rhyolite lava flows cropping out along the Malheur River. The Day 3 field route navigates to southern parts of the LOEA, where CRBG rocks are associated in space and time with lesser known and more complex silicic volcanic stratigraphy forming Middle Miocene, large-volume, bimodal basalt-rhyolite vent complexes. Key stops will provide a broad overview of the structure and stratigraphy of the Middle Miocene Mahogany Mountain caldera and of the significance of intercalated sedimentary beds and Middle to Late Miocene calc-alkaline lava flows of the Owyhee basalt. Initial stops on Day 4 will highlight exposures of Middle to Late Miocene silicic ash-flow tuffs, rhyolite domes, and calc-alkaline lava flows overlying the CRBG across the northern and central parts of the LOEA. The later stops on Day 4 examine more silicic lava flows and breccias that are overlain by early CRBG-related rhyolite eruptions. The return route to Portland on Day 4 traverses the Columbia River gorge westward from Baker City. The return route between Baker and Portland on Day 4 follows the Columbia River gorge and passes prominent basalt outcrops of large volume tholeiitic flood lavas of the Grande Ronde, Wanapum, and Saddle Mountains Formations of the CRBG. These sequences of basaltic and basaltic andesite lavas are typical of the well-studied flood basalt dominated Columbia Plateau, and interbedded silicic and calc-alkaline lavas are conspicuously absent. Correlation between the far-traveled CRBG lavas and calcalkaline and silicic lavas considered during the excursion relies on geochemical fingerprinting and dating of the mafic flows and dating of sparse intercalated ashes.
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Actes de conférences sur le sujet "Basalt plains"

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Pritchard, Chad J., David Gaylord, Drew B. Adams et Shawna Ernst. « ROLE OF QUATERNARY GLACIAL OUTBURST MEGAFLOOD PALEOCHANNEL DEPOSITS IN A BASALT-DOMINATED AQUIFER SYSTEM, WEST PLAINS AREA OF EASTERN WASHINGTON ». Dans 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329312.

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Swenton, Vanessa, Martin Streck, Daniel P. Miggins et William McIntosh. « NEWLY DISCOVERED PERIODICITY IN MIOCENE, HIGH LAVA PLAINS AND CO-CRBG RHYOLITES OF EASTERN OREGON TIED TO COEVAL BASALT MAGMATISM AND REGIONAL EXTENSION EVENTS ». Dans GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-365951.

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Endrich, Alyssa, Matthew Brueseke, Benjamin J. Walters et Alexander Karrasch. « PETROGENESIS OF CENOZOIC BASALTS IN THE CENTENNIAL VALLEY AND VICINITY IN SW MONTANA : OUT-OF-SEQUENCE SNAKE RIVER PLAIN BASALT ERUPTIONS NORTH OF THE EASTERN SNAKE RIVER PLAIN ? » Dans GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-366183.

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Da Costa Santos, Ana Caroline, et Paul Archbold. « Mechanical Properties and Fracture Energy of Concrete Beams Reinforced with Basalt Fibres ». Dans 4th International Conference on Bio-Based Building Materials. Switzerland : Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.316.

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Fibre-reinforced concrete (FRC) is widely employed in the construction industry, with assorted fibre types being used for different applications. Typically, steel fibres give additional tensile strength to the mixture, while flexible fibres may be used in large sections, such as floor slabs, to control crack width and to improve the handling ability of precast sections. For many reasons, including durability concerns, environmental impact, thermal performance, etc, alternatives to the currently available fibres are being sought. This study examines the potential of using basalt fibres, a mineral and natural material, as reinforcement of concrete sections in comparison to steel fibres and plain concrete mix. Mixes were tested containing 0.5% and 1.0% of basalt fibres measuring 25mm length, 0.5% of the same material with 48mm length and steel fibres measuring 50mm by 0.05%, 0.1%, 0.15% and 0.2% of the concrete volume. For the mechanical performance analysis, the 3-point bending test was led and the fracture energy, Young’s modulus and tensile strength in different moments of the tests were calculated. When compared to the control mixtures and the steel-fibre-reinforced concrete, the mixes containing basalt had a reduction in their elastic modulus, representing a decrease in the concrete brittleness. At the same time, the fracture energy of the mixtures was significantly increased with the basalt fibres in both lengths. Finally, the flexural strength was also higher for the natural fibre reinforced concrete than for the plain concrete and comparable to the results obtained with the addition of steel fibres by 0.15%.
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Abraham, Jared D., et David L. Wright. « Crosswell Radar Tomography Investigation of the Eastern Snake River Plain Basalt Flows at the Ineel ». Dans Symposium on the Application of Geophysics to Engineering and Environmental Problems 2002. Environment and Engineering Geophysical Society, 2002. http://dx.doi.org/10.4133/1.2927063.

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D. Abraham, Jared, et David L. Wright. « Crosswell Radar Tomography Investigation Of The Eastern Snake River Plain Basalt Flows At The Ineel ». Dans 15th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2002. http://dx.doi.org/10.3997/2214-4609-pdb.191.13bg3.

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Sindarovska, Yana. « Efficient transient gene expression in basil plants ». Dans ASPB PLANT BIOLOGY 2020. USA : ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1050098.

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Govender, Nisha. « In silico identification of Dicer-like proteins in Gaderma boninense, the basal stem rot of oil palm pathogen ». Dans ASPB PLANT BIOLOGY 2020. USA : ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1052033.

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Clason, Hayden D., Esther C. Badon, Keeanah M. Jones, Scott Vetter et John Shervais. « ORIGIN AND EVOLUTION OF LATE MIOCENE-PLEISTOCENE BASALT : CENTRAL MOUNT BENNETT HILLS, CENTRAL SNAKE RIVER PLAIN, IDAHO ». Dans 54th Annual GSA South-Central Section Meeting 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020sc-343518.

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Brosse, Morgane, Aymon Baud, Hugo Bucher, Nicolas Goudemand, Alexander Nützel, David Ware, Åsa Frisk et Hans Hagdorn. « BASAL TRIASSIC OMAN OASES : GRIESBACHIAN CRINOIDAL LIMESTONE FROM THE BATAIN PLAIN, EASTERN OMAN ». Dans GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-285137.

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Rapports d'organisations sur le sujet "Basalt plains"

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Sessa, Guido, et Gregory Martin. Role of GRAS Transcription Factors in Tomato Disease Resistance and Basal Defense. United States Department of Agriculture, 2005. http://dx.doi.org/10.32747/2005.7696520.bard.

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The research problem: Bacterial spot and bacterial speck diseases of tomato are causedby strains of Xanthomonas campestris pv. vesicatoria (Xcv) and Pseudomonas syringae pv.tomato (Pst), respectively. These bacteria colonize aerial parts of the plant and causesignificant losses in tomato production worldwide. Protection against Xcv and Pst bycultural practices or chemical control has been unsuccessful and there are only limitedsources of genetic resistance to these pathogens. In previous research supported in part byBARD IS-3237-01, we extensively characterized changes in tomato gene expression uponthe onset of spot and speck disease resistance. A remarkable finding of these studies wasthe inducibility in tomato leaves by both Xcv and Pst strains of genes encodingtranscriptional activator of the GRAS family, which has not been previously linked todisease resistance. Goals: Central goals of this research were to investigate the role of GRAS genes in tomatoinnate immunity and to assess their potential use for disease control.Specific objectives were to: 1. Identify GRAS genes that are induced in tomato during thedefense response and analyze their role in disease resistance by loss-of-function experiments.2. Overexpress GRAS genes in tomato and characterize plants for possible broad-spectrumresistance. 3. Identify genes whose transcription is regulated by GRAS family. Our main achievements during this research program are in three major areas:1. Identification of tomato GRAS family members induced in defense responses andanalysis of their role in disease resistance. Genes encoding tomato GRAS family memberswere retrieved from databases and analyzed for their inducibility by Pst avirulent bacteria.Real-time RT-PCR analysis revealed that six SlGRAS transcripts are induced during theonset of disease resistance to Pst. Further expression analysis of two selected GRAS genesshowed that they accumulate in tomato plants in response to different avirulent bacteria orto the fungal elicitor EIX. In addition, eight SlGRAS genes, including the Pst-induciblefamily members, were induced by mechanical stress in part in a jasmonic acid-dependentmanner. Remarkably, SlGRAS6 gene was found to be required for tomato resistance to Pstin virus-induced gene silencing (VIGS) experiments.2. Molecular analysis of pathogen-induced GRAS transcriptional activators. In aheterologous yeast system, Pst-inducible GRAS genes were shown to have the ability toactivate transcription in agreement with their putative function of transcription factors. Inaddition, deletion analysis demonstrated that short sequences at the amino-terminus ofSlGRAS2, SlGRAS4 and SlGRAS6 are sufficient for transcriptional activation. Finally,defense-related SlGRAS proteins were found to localize to the cell nucleus. 3. Disease resistance and expression profiles of transgenic plants overexpressing SlGRASgenes. Transgenic plants overexpressing SlGRAS3 or SlGRAS6 were generated. Diseasesusceptibility tests revealed that these plants are not more resistant to Pst than wild-typeplants. Gene expression profiles of the overexpressing plants identified putative direct orindirect target genes regulated by SlGRAS3 and SlGRAS6. Scientific and agricultural significance: Our research activities established a novel linkbetween the GRAS family of transcription factors, plant disease resistance and mechanicalstress response. SlGRAS6 was found to be required for disease resistance to Pstsuggesting that this and possibly other GRAS family members are involved in thetranscriptional reprogramming that takes place during the onset of disease resistance.Their nuclear localization and transcriptional activation ability support their proposed roleas transcription factors or co-activators. However, the potential of utilizing GRAS familymembers for the improvement of plant disease resistance in agriculture has yet to bedemonstrated.
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Wapner, Phillip, Kengqing Jian, Yuming Gao, Gregory Crawford, Robert Hurt et Wesley Hoffman. Pitch Wetting on Model Basal and Edge-Plane Surfaces. Fort Belvoir, VA : Defense Technical Information Center, juin 2004. http://dx.doi.org/10.21236/ada443495.

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Eshed, Yuval, et Sarah Hake. Shaping plant architecture by age dependent programs : implications for food, feed and biofuel. United States Department of Agriculture, décembre 2012. http://dx.doi.org/10.32747/2012.7597922.bard.

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Age dependent programs are responsible for the physiological and developmental differences of young and mature plants. These include a range of morphological characters such as leaf shape and leaf composition (waxes, lignin etc..) but also different in developmental potentials. Apical buds of juvenile plants are vegetative, while those of mature plants can be reproductive. Likewise, basal buds form in the axills of juvenile leaves have different fates than distal buds formed in the axils of mature leaves. The goal of our joint project is to understand and exploit theses age related programs for specific improvement of crop plants. To that end both the WIS group and the PGEC group are using mutants with age related defects as well as modified expression of miR156 to modify age related programs in crop plants- Tomato and potato in Israel and Maize, switchgrass and Brchipodium in the US. In the US, major effort were made to: Characterize the contribution of selected miR156 target genes to yield component traits of maize. Functional analysis of microRNAs and their targets in new crop plants. In Israel, the research progressed in several directions: Understanding the interplay between age dependent programs and the potential of tomato and potato meristems to produce tubers. Evaluation of the agronomic value of mutants that alter flowering regime in side shoots in general, and in the sympodial buds in particular Characterization of wild type axillary buds, comparing shoot ontogeny of gradually maturing apices from basal and distal positions along the main shoot of tomato.
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Meeuwsen, P. V. ,. Westinghouse Hanford. Multiple canister overpack fuel basket loading test plan. Office of Scientific and Technical Information (OSTI), mai 1996. http://dx.doi.org/10.2172/658916.

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Levy, Avraham A., et Virginia Walbot. Regulation of Transposable Element Activities during Plant Development. United States Department of Agriculture, août 1992. http://dx.doi.org/10.32747/1992.7568091.bard.

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We have studied the regulation of the maize Ac and MuDR transposable elements activities during plant development. Ac was studied in an heterologous system (transgenic tobacco plants and cell suspensions) while MuDR was studied in the native maize background. The focus of this study was on the transcriptional regulation of Ac and MuDR. For Ac, the major achievements were to show that 1-It is autoregulated in a way that the Ac-encoded transposase can repress the activity of its own promoter; 2-It is expressed at low basal level in all the plant organs that were studied, and its activity is stronger in dividing tissues -- a behaviour reminiscent of housekeeping genes; 3- the activity of Ac promoter is cell cycle regulated -- induced at early S-phase and increasing until mitosis; 4- host factor binding sites were identified at both extremities of Ac and may be important for transposition. For MuDR, It was shown that it encodes two genes, mudrA and mudrB, convergently transcribed from near-identical promoters in the terminal inverted repeats. Distinct 5' start sites, alternative splicing, production of antisense RNA and tissue specificity were all shown to be involved in the regulation of MuDR.
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McNeil, D. H., J. Dixon et K. M. Bell. The age, foraminifera, and palynology of the Upper Cretaceous Eagle Plain Group, northern Yukon. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328237.

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A re-evaluation of the age of the formations comprising the Eagle Plain Group of northern Yukon was necessitated by widely disparate age determinations in recent years from various authors. Maximum age estimates for the base of the group have varied from middle Albian to Cenomanian, and age estimates for the uppermost strata varied by an even greater range, from Cenomanian to late Maastrichtian. A re-examination of new and archival foraminiferal and palynological data indicates an age range of Cenomanian to late Maastrichtian for the Eagle Plain Group. The late Maastrichtian age is derived from palynology from the northeasternmost area of Eagle Plain. However, the stratigraphic relationship of these youngest beds within Eagle Plain Group remains uncertain. Marine strata of the Eagle Plain Group contain foraminiferal indices that correlate with long-established regional foraminiferal zones from the Mackenzie Delta area. The Cenomanian Zone of Trochammina superstes occurs in the Parkin and Boundary Creek formations of Eagle Plain and Mackenzie Delta, respectively. The Haplophragmoides bilobatus and overlying Glaphyrammina spirocompressa zones occur in the Burnthill Creek and Smoking Hills formations of Eagle Plain and Mackenzie Delta, respectively. Reworked microfossils are a conspicuous feature of strata within the Eagle Plain Group. The basal sandstone of the Parkin Formation, for example, contains an assemblage of foraminifera that is entirely reworked. Palynomorph assemblages through the Eagle Plain Group have been estimated at as much as 99% reworked in some strata.
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Pérez Pérez, Edgar Selvin, Marai El Fassi et Lucia Benavidades. Efectividad de la Adaptación basada en Ecosistemas Estudio de caso del Plan de Manejo de la Subcuenca del Río Pasabién. TMG Research gGmbH, mars 2021. http://dx.doi.org/10.35435/1.2021.2.

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Kerr, D. E. Reconnaissance surficial geology, Beechey Lake, Nunavut, NTS 76-G. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329669.

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Preliminary mapping studies of Beechey Lake map area, through aerial photograph interpretation and limited legacy data, improve our understanding of surficial sediments and glacial history. The area is dominated by glacially and meltwater-scoured bedrock, hummocky moraine, till of varying thickness occasionally streamlined, and thin ridged till. Glacial lake sediments are predominantly in river valley lowlands. Glaciolacustrine delta and raised beach elevations range from 410 m to 230 m and 440 m to 290 m, respectively. Glaciofluvial deposits consist of eskers, ice-contact mounds, proglacial outwash plains, and terraces. Basal meltwater from regional ice stagnation and downwasting scoured subglacial and proglacial meltwater corridors and channels of varying width, many trending northwest. A glaciomarine delta was deposited in a high-sea marine environment following deglaciation in the northernmost map area. Streamlined till and bedrock landforms and striations indicate regional ice flow was dominantly northwest. A late westward and southwestward deglacial ice flow is preserved sporadically in the easternmost map area, and well preserved in the west-central and southwestern map areas, west of a discontinuous hummocky moraine belt.
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9

Short, Mary, et Sherry Leis. Vegetation monitoring in the Manley Woods unit at Wilson’s Creek National Battlefield : 1998–2020. Sous la direction de Tani Hubbard. National Park Service, juin 2022. http://dx.doi.org/10.36967/nrr-2293615.

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Natural resource management at Wilson’s Creek National Battlefield (NB) is guided by our understanding of the woodlands and prairies at the time of the Civil War battle in 1861. This report is focused on the Manley Woods unit of the park. This unit is an oak-hickory woodland in the Springfield Plain subsection of the Ozarks. Canopy closure for Missouri oak woodlands can be highly variable and ranges from 30–100% across the spectrum of savanna, open woodland, and closed woodland types. In 1861, the woodland was likely a savanna community. Changes in land use (e.g., fire exclusion) caused an increase in tree density in woodlands at Wilson’s Creek NB and across the Ozarks. Savannas and open woodlands transitioned to closed canopy woodlands over time. Park management plans include restoring the area to a savanna/open woodland structure. Prescribed fire was reintroduced to Wilson’s Creek NB in 1988 and continues as the primary mechanism for reducing the tree canopy. The Manley Woods unit of Wilson’s Creek NB has been subject to intense natural and anthropogenic disturbance events such as a tornado in 2003, timber removal in 2005, prescribed fires in 2006, 2009, and 2019, an ice storm in 2007, and periodic drought. The Heartland Inventory and Monitoring Network (hereafter, Heartland Network) installed four permanent monitoring sites within the Manley Woods area of the park in 1997. Initially, we assessed ground flora and regeneration within the sites (1998–1999). We added fuel sampling after the 2003 tornado. Although overstory sampling occurred prior to the tornado, the protocol was not yet stabilized and pre-2003 overstory data were not included in these analyses. In this report, we focus on the overstory, tree regeneration, and ground cover metrics; ground flora data will be assessed in future analyses. Heartland Network monitoring data reveal that Manley Woods has undergone substantial change in canopy cover and midstory trees since 1998. While basal area and density metrics classify Manley Woods as an open woodland, the closed canopy of the midstory and overstory reveal a plant community that is moving toward closed woodland or forest structure. The most recent fire in 2019 was patchy and mild, resulting in continued increases in fuels. Ground cover metrics indicate infrequent disturbance since leaf litter continued to increase. Management objectives to restore savanna or woodland composition and structure to the Manley Woods overstory, regeneration layer, and ground cover will require implementation of prescribed fire in the future. Repeated fires can thin midstory trees and limit less fire tolerant early seral species. Additionally, mechanical or chemical treatments to reduce undesirable tree species should be considered for woodland restoration. Decreasing canopy closure is an important and essential step toward the restoration of a functioning savanna/open woodland plant community in Manley Woods. Treatments that thin the midstory and reduce fuel loading will also benefit these plant communities. With the anticipated changing climate, maintaining an open woodland community type may also provide resilience through management for native species tolerant of increasingly warmer temperatures.
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10

Bennecke, W. M., et S. H. Wood. Impeller flow-meter logging of vertical cross flow between basalt aquifers through wells at the Idaho National Engineering Laboratory, Eastern Snake River Plain, Idaho. Progress report, June 22, 1992. Office of Scientific and Technical Information (OSTI), décembre 1992. http://dx.doi.org/10.2172/10156868.

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