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Journal articles on the topic 'Basal deposits'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

DOS SANTOS, MANOEL LUIZ, and JOSÉ CANDIDO STEVAUX. "Fáceis e associações dos depósitos rudáceos na rudáceos na Bacia do Rio Paraná em seu curso superior: uma tentativa de classificação." Pesquisas em Geociências 28, no. 2 (December 31, 2001): 171. http://dx.doi.org/10.22456/1807-9806.20284.

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This paper proposes a classification of gravel deposits in the upper Paraná River Basin based on their genesis, sedimentary facies and depositional processes. They were classified in four types: a) Upper slope oligomictic gravel (Fine and coarse-sand associations) – this deposit is associated with the origin of hydrographic basin during the Tertiary; b) Middle slope oligomictic gravel – It constitutes colluvial deposits related to present topography; c) Lower slope oligomictic gravel – this deposit is associated with present river valley; d) Polymictic gravel – deposited during the Pleistocene

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Feng, Jin-Liang, Jian-Ting Ju, Feng Chen, Zhao-Guo Hu, Xiang Zhao, and Shao-Peng Gao. "Identification of a late Quaternary alluvial–aeolian sedimentary sequence in the Sichuan Basin, China." Quaternary Research 85, no. 2 (March 2016): 279–89. http://dx.doi.org/10.1016/j.yqres.2016.01.006.

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The late Quaternary sedimentary sequence in the northwestern part of the Sichuan Basin consists of five lithological units and with increasing depth include the: Chengdu Clay; Brown Clay; Red Clay; Sandy Silt; and basal Muddy Gravel. The genesis, provenance and age of the sediments, as well as the possible presence of hiatuses within this sequence are debated. Measurements of grain-size, magnetic susceptibility, quartz content, quartz δ18O values, element composition, and Sr–Nd isotopic concentrations of samples from a typical sedimentary sequence in the area provides new insights into the gen

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Katamura, Fumitaka, Masami Fukuda, Nikolai Petrovich Bosikov, and Roman Vasilievich Desyatkin. "Charcoal records from thermokarst deposits in central Yakutia, eastern Siberia: Implications for forest fire history and thermokarst development." Quaternary Research 71, no. 1 (January 2009): 36–40. http://dx.doi.org/10.1016/j.yqres.2008.08.003.

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AbstractMacroscopic charcoal records from a thermokarst lake deposit in central Yakutia, eastern Siberia, were used to reconstruct the history of forest fires and investigate its relationship to thermokarst initiation. High accumulation rates of charcoal and pollen were coincident in the basal deposits of the thermokarst lake, which suggests that both were initially deposited on the forest floor and subsequently reworked and accumulated in the thermokarst depression. High charcoal and pollen accumulation rates in the basal deposits, dating to 11,000–9000 cal yr BP, also indicate that the therm

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Wellman, Charles H. "Palynology of the ‘Lower Old Red Sandstone’ at Glen Coe, Scotland." Geological Magazine 131, no. 4 (July 1994): 563–66. http://dx.doi.org/10.1017/s0016756800012176.

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Abstract‘Lower Old Red Sandstone’ deposits preserved by cauldron subsidence at Glen Coe, Scotland have hitherto lacked secure biostratigraphical age constraint. A sporomorph assemblage recovered from basal sediments of these deposits permits age determination, despite being highly carbonized. The sporomorph assemblage is correlated with the micrornatus-newportensis Sporomorph Assemblage Biozone, indicating a late early-early late Lochkovian age (early Devonian). Sporomorph assemblages from basal sediments of the ‘Lower Old Red Sandstone’ sequence at nearby Lorne, a suggested correlative of the

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Yang, Ya. "Study on Sedimentary Facies of the Lower Eocene Basal Deposits in the Southeastern Part of the Jiyang Depression, Bohai Bay Basin, China." Mobile Information Systems 2022 (September 5, 2022): 1–8. http://dx.doi.org/10.1155/2022/2959031.

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Based on the analysis of cores, logging, and seismic data, this paper identifies the sedimentary facies of the basal deposits from the lower Eocene in the southeastern part of the Jiyang Depression and studies its depositional law. On this basis, a sedimentary model of the basal deposits is established. The basal sediments of the lower Eocene in the Jiyang Depression are mainly red, brown, gray, and variegated clastic rocks, which are mainly divided into Kongdian and lower Shahejie-4 Formation. It is considered that the climate during the depositional period was relatively arid, and the deposi

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Sobiesiak, Matheus S., Ben Kneller, G. Ian Alsop, and Juan Pablo Milana. "Styles of basal interaction beneath mass transport deposits." Marine and Petroleum Geology 98 (December 2018): 629–39. http://dx.doi.org/10.1016/j.marpetgeo.2018.08.028.

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VILAS BÔAS, GERALDO S., FLÁVIO J. SAMPAIO, and ANTONIO M. S. PEREIRA. "The Barreiras Group in the Northeastern coast of the State of Bahia, Brazil: depositional mechanisms and processes." Anais da Academia Brasileira de Ciências 73, no. 3 (September 2001): 417–27. http://dx.doi.org/10.1590/s0001-37652001000300010.

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The Barreiras Group is a Miocene to Lower Pleistocene continental terrigenous sedimentary deposit exhibiting a large occurrence along the Brazilian coast. In the Conde region, located in the northeastern part of the State of Bahia, the sedimentological characteristics of these sediments are indicative of a deposition as gravelly and sandy bed load in braided fluvial systems, related to alluvial fans, under an arid to semi-arid climate. The basal portion of the group is dominated by a gravelly-sandy lithofacies deposited by debris flows and pseudoplastic debris flows, with lesser occurrences of

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Song, Delu, Imran Mohammed, Rupak Bhuyan, Takashi Miwa, Allison Lesher Williams, Damodar Gullipalli, Sayaka Sato, Ying Song, Joshua L. Dunaief, and Wen-Chao Song. "Retinal Basal Laminar Deposits in Complement fH/fP Mouse Model of Dense Deposit Disease." Investigative Opthalmology & Visual Science 59, no. 8 (July 10, 2018): 3405. http://dx.doi.org/10.1167/iovs.18-24133.

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Satti, Mohamed B., and John G. Azzopardi. "Amyloid deposits in basal cell carcinoma of the skin." Journal of the American Academy of Dermatology 22, no. 6 (June 1990): 1082–87. http://dx.doi.org/10.1016/0190-9622(90)70156-c.

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Passchier, Sandra, Anja L. L. M. Verbers, Frederik M. Van Der Wateren, and Frans J. M. Vermeulen. "Provenance, geochemistry and grain-sizes of glacigene sediments, including the Sirius Group, and Late Genozoic Glaciol history of the southern Prince Albert Mountains, Victoria Land, Antarctica." Annals of Glaciology 27 (1998): 290–96. http://dx.doi.org/10.3189/1998aog27-1-290-296.

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The southern Prince Albert Mountains, between David and Mawson Glaciers (75°30' to 76°S) in Victoria Land, Antarctica, comprise a series of nunataks with elevations ranging from 800m near the coast to 2300 m ~130 km inland. Geochemical and grain-size analyses of tills from these nunataks reveal three major groups of deposits: (1) coarse to medium sandy tills, found on Glaciolly streamlined summit plateaus of Kirk-pat rick Basalt above 2000 ma.s.l.., with geochemical compositions very similar to those of the underlying jurassic Kirkpatrick Basalt; (2) bimodal silty and sanely tills of the Siriu

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Dec, Tomasz, H. Scott Swinden, and R. Greg Dunning. "Lithostratigraphy and geochemistry of the Cottrells Cove Group, Buchans – Roberts Arm volcanic belt: new constraints for the paleotectonic setting of the Notre Dame Subzone, Newfoundland Appalachians." Canadian Journal of Earth Sciences 34, no. 1 (January 1, 1997): 86–103. http://dx.doi.org/10.1139/e17-008.

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New sedimentological, geochemical, and geochronological data from the Cottrells Cove Group in central Newfoundland provide important constraints on the nature of the Notre Dame Subzone, its tectonic setting, and the history of the Laurentian margin during the Early Ordovician. The Cottrells Cove Group forms the eastern extension of the Roberts Arm Group and correlates with the Chanceport Group on New World Island. It is represented by two volcano-sedimentary formations that occur in a complex thrust stack. The Fortune Harbour Formation consists of calc-alkalic, island-arc lavas, followed by a

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Kogaya, Y., and K. Furuhashi. "Ultrastructural distribution of sulfated glycosaminoglycans in epithelial-mesenchymal interface of developing rat tooth germs." Journal of Histochemistry & Cytochemistry 35, no. 5 (May 1987): 585–93. http://dx.doi.org/10.1177/35.5.2435784.

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We investigated the ultrastructural distribution of sulfated glycosaminoglycans in the epithelial-mesenchymal interface of tooth germs by use of the high-iron diamine thiocarbohydrazide silver proteinate (HID-TCH-SP) staining and enzymatic digestion method. At an early stage in odontoblast differentiation, HID-TCH-SP stain deposits were sparsely distributed in the basement membrane and in the intercellular spaces. Subsequently, as formation of the initial predentin matrix began, HID-TCH-SP stain deposits were densely distributed in the interfibrillar spaces and the basement membrane. Testicula

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Badhani, Shray, Antonio Cattaneo, Stefano Collico, Roger Urgeles, Bernard Dennielou, Estelle Leroux, Florent Colin, Sebastien Garziglia, Marina Rabineau, and Laurence Droz. "Integrated geophysical, sedimentological and geotechnical investigation of submarine landslides in the Gulf of Lions (Western Mediterranean)." Geological Society, London, Special Publications 500, no. 1 (2020): 359–76. http://dx.doi.org/10.1144/sp500-2019-175.

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AbstractThe Gulf of Lions presents recurring mass-transport deposits (MTDs) within the Plio-Quaternary sediments, suggesting a long history of mass movements. The two large, surficial MTDs are located on the eastern and western levee of the Rhone canyon over an area exceeding 6000 km2 and volumes exceeding 100 km3. Both MTDs were emplaced 21 ka ago (peak of the Last Glacial Maximum), suggesting a common trigger. Here, we present a multidisciplinary high-resolution geophysical, sedimentological and in-situ geotechnical study of the source and deposit areas of both MTDs to characterize distinct

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Chashchin, V. V., and V. N. Ivanchenko. "Sulfide PGE–Cu–Ni and Low-Sulfide Pt–Pd Ores of the Monchegorsk Ore District (Arctic Western Sector): Geology, Mineralogy, Geochemistry, and Genesis." Russian Geology and Geophysics 63, no. 4 (April 1, 2022): 519–42. http://dx.doi.org/10.2113/rgg20214410.

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Abstract During the recent exploration of the Monchegorsk ore district (MOD) in the Arctic western sector, the platinum potential of known Cu–Ni deposits (Nittis-Kumuzhya-Travyanaya (NKT), Nyud, Ore Horizon 330 (OH330), and Terrasa) has been assessed, and new sulfide PGE–Cu–Ni deposits (Western Nittis) and manifestations (Moroshkovoe Ozero, Poaz, and Arvarench), and low-sulfide Pt–Pd deposits (Loipishnyun, Southern Sopcha, and Vuruchuaivench) have been discovered. All of them are confined to Paleoproterozoic (ca. 2.5 Ga) layered intrusions (the Monchegorsk pluton (Monchepluton) and the Monchet

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Miramontes, Elda, Nabil Sultan, Sébastien Garziglia, Gwenael Jouet, Ewan Pelleter, and Antonio Cattaneo. "Altered volcanic deposits as basal failure surfaces of submarine landslides." Geology 46, no. 7 (June 12, 2018): 663–66. http://dx.doi.org/10.1130/g40268.1.

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Kidder, D. L., and K. Swett. "Basal Cambrian reworked phosphates from Spitsbergen (Norway) and their implications." Geological Magazine 126, no. 1 (January 1989): 79–88. http://dx.doi.org/10.1017/s0016756800006166.

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AbstractSeveral phosphatic zones are associated with the oldest remains of shelly fossils on the arctic island of Spitsbergen. The phosphate occurs as reworked nodules and layers associated with a disconformity. A gap in the acritarch biostratigraphic record supports a hiatus associated with the phosphatic zone. Palaeogeographic positions for Svalbard, both (1) as a single unit, and (2) as three isolated parts prior to Caledonian tectonism are consistent with conditions favourable to at least minimal amounts of upwelling. However, upwelling may not have been a prerequisite for development of t

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Adair, R. N., and R. A. Burwash. "Evidence for pyroclastic emplacement of the Crowsnest Formation, Alberta." Canadian Journal of Earth Sciences 33, no. 5 (May 1, 1996): 715–28. http://dx.doi.org/10.1139/e96-055.

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The middle Cretaceous Crowsnest Formation west of Coleman, Alberta, is composed of bedded alkaline volcanic deposits containing heterolithic volcanic rock fragments and crystal clasts. Comparison with modern examples of subaerial pyroclastic rocks suggests that pyroclastic flows, surges, fallout of material from vertical eruption columns, and minor mud flows emplaced the deposits. Textural evidence in the form of plastically deformed volcanic fragments, chilled deposit margins, baked rock fragment margins, recrystallization, and the presence of charred wood and charred wood molds indicate empl

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Šimo, Vladimír, and Adam Tomašových. "Trace-fossil assemblages with a new ichnogenus in “spotted”." Geologica Carpathica 64, no. 5 (October 1, 2013): 355–74. http://dx.doi.org/10.2478/geoca-2013-0024.

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Abstract Highly-bioturbated “spotted” limestones and marls (Fleckenmergel-Fleckenkalk facies) of the Early Jurassic, which were deposited in broad and recurrent deep-shelf habitats of the Northern Tethys, are characterized by rare benthic carbonate-producing macroinvertebrates. To address this paradox, we analyse trace-fossil assemblages in a ~85 m-thick succession of Pliensbachian spotted deposits (Zliechov Basin, Western Carpathians). They are dominated by infaunal and semi-infaunal deposit-feeders, with 9 ichnogenera and pyritized tubes of the semi-infaunal foraminifer Bathysiphon, being do

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Schellmann, Gerhard, Patrick Schielein, Wolfgang Rähle, and Christoph Burow. "The formation of Middle and Upper Pleistocene terraces (<i>Übergangsterrassen</i> and <i>Hochterrassen</i>) in the Bavarian Alpine Foreland – new numeric dating results (ESR, OSL, <sup>14</sup>C) and gastropod fauna analysis." E&G Quaternary Science Journal 68, no. 2 (July 25, 2019): 141–64. http://dx.doi.org/10.5194/egqsj-68-141-2019.

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Abstract. Until now, reliable chronological classifications based on numerical ages for many Pleistocene fluvial deposits in the Alpine Foreland were rare. In this study, new numeric data (ESR, OSL, 14C) from Middle and Upper (Late) Pleistocene Hochterrassen (high terraces) and Übergangsterrassen (transitional terraces) in the Bavarian Alpine Foreland are presented. The dating results imply that the Hochterrassen gravel sensu stricto were deposited during the penultimate glacial (MIS 6, Rissian), and that underlying older gravel accumulation are predominantly of penultimate interglacial (MIS 7

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Valentine, Greg A., David C. Buesch, and Richard V. Fisher. "Basal layered deposits of the Peach Springs Tuff, northwestern Arizona, USA." Bulletin of Volcanology 51, no. 6 (September 1989): 395–414. http://dx.doi.org/10.1007/bf01078808.

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Bellas, S., and H. Keupp. "CONTRIBUTION TO THE LATE NEOGENE STRATIGRAPHY OF THE ANCIENT GORTYS AREA (SOUTHERN CENTRAL CRETE, GREECE)." Bulletin of the Geological Society of Greece 43, no. 2 (January 23, 2017): 579. http://dx.doi.org/10.12681/bgsg.11220.

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Most of the basal Neogene sediments of Crete Island (South Aegean Sea) were unconformably deposited during synsedimentary extensional tectonics and subsequent transgression on the basement. This work mainly focuses on the marine stratigraphy of south central Crete and specifically on the sedimentary deposits of the Gortys subbasin-area located in the basin of Messara. Four selected profiles north of Gortys ancient ruins (Heraklion Province) are lithostratigraphically presented. Profiles Gortys-1 and -2 (combined to one: 1+2) represent the basal Neogene deposits (older strata-commence of sedime

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McMahon, William J., and Neil S. Davies. "Physical and biological functioning in Proterozoic rivers: evidence from the archetypal pre-vegetation alluvium of the Torridon Group, NW Scotland." Scottish Journal of Geology 56, no. 1 (October 11, 2019): 1–29. http://dx.doi.org/10.1144/sjg2019-013.

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In modern rivers, vegetation affects hydrological, geomorphological and sedimentological functioning, so extant fluvial systems can provide only partial analogues for those rivers that operated before the evolution of land plants. However, pre-vegetation rivers were the norm for the first 90% of Earth's history and so a better understanding of their sedimentary product can provide insights into both the fundamental underlying mechanisms of river behaviour and the ways in which fluvial processes operated on ancient Earth. In addition to a short review of the history of research into pre-vegetat

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Smyk, Mark C., and James M. Franklin. "A synopsis of mineral deposits in the Archean and Proterozoic rocks of the Lake Nipigon Region, Thunder Bay District, Ontario." Canadian Journal of Earth Sciences 44, no. 8 (August 1, 2007): 1041–53. http://dx.doi.org/10.1139/e07-013.

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A variety of metallic and non-metallic mineral deposit types occur within Archean and Proterozoic rocks in the area encompassing the Lake Nipigon Region Geoscience Initiative. Archean deposit types include Algoma-type banded iron formation-hosted iron (e.g., Lake Nipigon iron range); volcanogenic massive sulphide copper–zinc (e.g., Onaman–Tashota belt); ultramafic intrusion-hosted chromium (e.g., Puddy–Chrome lakes); mafic to ultramafic intrusion-hosted copper–nickel – platinum group element (PGE) (e.g., Lac des Iles); and pegmatite-hosted deposits of rare metals (Li, Ta, Be), uranium, and mol

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Groves, D. A., R. L. Morton, and J. M. Franklin. "Physical volcanology of the footwall rocks near the Mattabi massive sulphide deposit, Sturgeon Lake, Ontario." Canadian Journal of Earth Sciences 25, no. 2 (February 1, 1988): 280–91. http://dx.doi.org/10.1139/e88-030.

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Subaerial and shallow subaqueous mafic hyalotuffs, lava flows, and flow breccias, felsic lava flows, and pyroclastic flows and falls form a 2 km thick succession beneath the Mattabi massive sulphide deposit. The lowermost 800 m of section comprises massive to amygdaloidal mafic flows and flow breccias interlayered with repetitive sequences of thinly bedded felsic tuff: pillow lavas and hyaloclastites are absent. Amygdaloidal felsic lavas overlie the mafic flows and are locally capped by coarse explosion breccia. This breccia is believed to represent the start of mafic hydrovolcanism, which pro

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Nehyba, Slavomír, Jiří Otava, Pavla Tomanová Petrová, and Adéla Gazdová. "The foreland state at the onset of the flexurally induced transgression: data from provenance analysis at the peripheral Carpathian Foredeep (Czech Republic)." Geologica Carpathica 70, no. 3 (June 1, 2019): 241–60. http://dx.doi.org/10.2478/geoca-2019-0014.

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Abstract The Žerotice Formation recognised in a confined area NE–SE of Znojmo represents a basal member of the sedimentary succession of the southwestern margin of the Carpathian Foredeep in Moravia (Czech Republic). Two facies associations were recognised within the formation. The first one mantles the pre-Neogene basement with an irregular unconformity, reflects arid climatic conditions and deposition of episodic shallow, high-energy stream flows and/or mass flows (alluvial to fluvial deposits). The second facies association is interpreted as lagoonal to distal flood plain deposits. The barr

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Oummouch, Abdellah, Abderrahim Essaifi, Rachid Zayane, Othmane Maddi, Mohamed Zouhair, and Lhou Maacha. "Geology and Metallogenesis of the Sediment-Hosted Cu-Ag Deposit of Tizert (Igherm Inlier, Anti-Atlas Copperbelt, Morocco)." Geofluids 2017 (November 15, 2017): 1–19. http://dx.doi.org/10.1155/2017/7508484.

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The Tizert Cu-Ag deposit is the largest of a series of sediment-hosted copper deposits of the Anti-Atlas copper province in Morocco. Mineralized rocks in the deposit contain disseminated sulphides within a Late Ediacaran, dominantly siliciclastic sedimentary formation named the Basal Series. Isopach map of the Basal Series thickness shows that during the Late Ediacaran the area was composed of large subsiding zones separated by paleohighs. The ore-grade zones are well developed along basin margins adjacent to the basement paleohighs. These mineralized zones display a lateral sulphide zoning wi

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Phillips, Stephen P., John A. Howell, Adrian J. Hartley, and Magda Chmielewska. "Coarse-grained meandering distributive fluvial system of the basal Cedar Mountain Formation, U.S.A." Journal of Sedimentary Research 91, no. 11 (November 22, 2021): 1188–205. http://dx.doi.org/10.2110/jsr.2020.065.

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ABSTRACT The analysis of downstream changes in ancient fluvial systems can better inform depositional models for foreland-basin systems. Herein we analyze the basal deposits of the Early Cretaceous Cedar Mountain Formation of Utah to better understand the variety of fluvial deposits present and to develop a depositional model for the Sevier foreland basin. We also evaluate the long-held interpretation of a braided origin for these deposits and document numerous examples of point-bar deposition in highly sinuous meandering rivers by analysis of large (20 to 60 km2) plan-view exposures. These pl

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Galloway, Chad A., Sonal Dalvi, Sandy S. C. Hung, Leslie A. MacDonald, Lisa R. Latchney, Raymond C. B. Wong, Robyn H. Guymer, et al. "Drusen in patient-derived hiPSC-RPE models of macular dystrophies." Proceedings of the National Academy of Sciences 114, no. 39 (September 6, 2017): E8214—E8223. http://dx.doi.org/10.1073/pnas.1710430114.

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Age-related macular degeneration (AMD) and related macular dystrophies (MDs) are a major cause of vision loss. However, the mechanisms underlying their progression remain ill-defined. This is partly due to the lack of disease models recapitulating the human pathology. Furthermore, in vivo studies have yielded limited understanding of the role of specific cell types in the eye vs. systemic influences (e.g., serum) on the disease pathology. Here, we use human induced pluripotent stem cell-retinal pigment epithelium (hiPSC-RPE) derived from patients with three dominant MDs, Sorsby’s fundus dystro

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Nugraha, Harya D., Christopher A. L. Jackson, Howard D. Johnson, and David M. Hodgson. "Lateral variability in strain along the toewall of a mass transport deposit: a case study from the Makassar Strait, offshore Indonesia." Journal of the Geological Society 177, no. 6 (July 13, 2020): 1261–79. http://dx.doi.org/10.1144/jgs2020-071.

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Contractional features characterize the toe domain of mass transport deposits. Their frontal geometry is typically classified as frontally confined or frontally emergent. However, it remains unclear how the style of frontal emplacement and contractional strain within a mass transport deposit vary along-strike. We use bathymetry and 3D seismic reflection data to investigate the lateral variability of frontal emplacement and strain within the toe domain of the Haya Slide in the Makassar Strait, offshore Indonesia. The slide originated from an anticline flank collapse and the toe domain is charac

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Lauro, Soldovieri, Orosei, Cicchetti, Cartacci, Mattei, Cosciotti, Di Paolo, Noschese, and Pettinelli. "Liquid Water Detection under the South Polar Layered Deposits of Mars—a Probabilistic Inversion Approach." Remote Sensing 11, no. 20 (October 21, 2019): 2445. http://dx.doi.org/10.3390/rs11202445.

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Liquid water was present on the surface of Mars in the distant past; part of that water is now in the ground in the form of permafrost and heat from the molten interior of the planet could cause it to melt at depth. MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) has surveyed the Martian subsurface for more than fifteen years in search for evidence of such water buried at depth. Radar detection of liquid water can be stated as an inverse electromagnetic scattering problem, starting from the echo intensity collected by the antenna. In principle, the electromagnetic problem c

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Harland, T. L., and R. K. Pickerill. "Ordovician rocky shoreline deposits-the basal Trenton Group around Quebec City, Canada." Geological Journal 19, no. 3 (April 30, 2007): 271–98. http://dx.doi.org/10.1002/gj.3350190306.

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Salsabili, Mohammad, Ali Saeidi, Alain Rouleau, and Miroslav Nastev. "3D Probabilistic Modelling and Uncertainty Analysis of Glacial and Post-Glacial Deposits of the City of Saguenay, Canada." Geosciences 11, no. 5 (May 7, 2021): 204. http://dx.doi.org/10.3390/geosciences11050204.

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Knowledge of the stratigraphic architecture and geotechnical properties of surficial soil sediments is essential for geotechnical risk assessment. In the Saguenay study area, the Quaternary deposits consist of a basal till layer and heterogeneous post-glacial deposits. Considering the stratigraphic setting and soil type heterogeneity, a multistep stochastic methodology is developed for 3D geological modelling and quantification of the associated uncertainties. This methodology is adopted for regional studies and involves geostatistical interpolation and simulation methods. Empirical Bayesian k

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Hu, Guang Ming, Shun She Luo, Marjorie A. Chan, and Hong Ping Xiao. "Significance of Terrace Deposits in Fluvial Sequence Stratigraphy." Applied Mechanics and Materials 318 (May 2013): 423–27. http://dx.doi.org/10.4028/www.scientific.net/amm.318.423.

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The terrace deposits in a river valley are key records to the research of fluvial sequence stratigraphy. Terrace deposits and the basal sequence boundary comprise the half-cycle of base level fall, and the fluvial infillings belong to the half-cycle of base level rise. Thus, terrace deposits and the basal sequence boundary are part of the regressive systems tract, and should be separated from the transgressive or lowstand systems tracts in previously published littoral fluvial sequence stratigraphic models. In addition, in the upstream portions of the fluvial system where sea level cannot reac

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Melcher, Frank, and Peter Krois. "Syngenetic and diagenetic formation of ore deposits in the metamorphosed sediments of the basal Brenner Mesozoic (Stubai Valley, Austria)." Neues Jahrbuch für Geologie und Paläontologie - Monatshefte 1992, no. 4 (June 17, 1992): 207–20. http://dx.doi.org/10.1127/njgpm/1992/1992/207.

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DELPOMDOR, Franck R. A., Archange M. ILAMBWETSI, Fabricío A. CAXITO, and Antonio C. PEDROSA-SOARES. "New interpretation of the basal Bambuí Group, Sete Lagoas High (Minas Gerais, E Brazil) by sedimentological studies and regional implications for the aftermath of the Marinoan glaciation: Correlations across Brazil and Central Africa." Geologica Belgica 23, no. 1-2 (January 4, 2020): 1–17. http://dx.doi.org/10.20341/gb.2019.010.

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Along the preserved southeast border (i.e., the Sete Lagoas High) of the Bambuí basin, the Pedro Leopoldo Member, basal succession of the Sete Lagoas Formation, unconformably overlies the Archean basement, and mostly includes carbonates with thin pelite intercalations and rare ruditic deposits. One of these, the so-called Carrancas conglomerate in its type-section, has been considered one of the lowermost rudite deposits of the Bambuí basin, being frequently ascribed to a Neoproterozoic glaciation. However, our detailed study, based on facies analysis, reveals that the Carrancas conglomerate w

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Rooyakkers, Shane M., John Stix, Kim Berlo, and Simon J. Barker. "Emplacement of unusual rhyolitic to basaltic ignimbrites during collapse of a basalt-dominated caldera: The Halarauður eruption, Krafla (Iceland)." GSA Bulletin 132, no. 9-10 (January 13, 2020): 1881–902. http://dx.doi.org/10.1130/b35450.1.

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Abstract Deposits of the ca. 110 ka Halarauður eruption of Krafla caldera (reconstructed volume = 7 ± 6 km3 dense rock equivalent) include the only spatter-rich ignimbrite known in Iceland, and an exceptionally rare lava-like basaltic ignimbrite. We present a revised stratigraphy and new whole-rock major-element data set for products of this unusual event, one of only three Quaternary ignimbrite eruptions identified in Iceland. Compositions of Halarauður products span a broad range (50.0–74.6 wt% SiO2), reflecting mixing of rhyolite with underplating basalt. Small-volume, valley-ponded, basal

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Suarez, M., and C. M. Bell. "Upper Triassic to Lower Cretaceous continental and coastal saline lake evaporites inthe Atacama region of northern Chile." Geological Magazine 124, no. 5 (September 1987): 467–75. http://dx.doi.org/10.1017/s0016756800017040.

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AbstractEvaporites within Upper Triassic to Lower Cretaceous sequences in the Atacama region of northern Chile are interpreted as the deposits of continental and coastal saline lakes. Halite casts and finely laminated calcareous evaporites, intercalated with alluvial and fluvial sediments, are probably playa lake deposits. These continental evaporites have been recognized in Upper Triassic alluvial sediments (Cifuncho Formation), in Upper Triassic–Lower Jurassic braided river deposits (basal unit of the Pan de Azúcar Formation), and within a sequence of Lower Cretaceous aeolian, alluvial and p

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DE BORBA, ANDRÉ WEISSHEIMER, and ANA MARIA PIMENTEL MIZUSAKI. "Significado Tectônico dos Depósitos de Leques Aluviais da Formação Santa Bárbara (Eo-Paleozóico) na Região de Caçapava do Sul (RS, Brasil)." Pesquisas em Geociências 29, no. 1 (June 30, 2002): 31. http://dx.doi.org/10.22456/1807-9806.19596.

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The alluvial fan deposits of Early Paleozoic Santa Bárbara Formation, located in Sul-rio-grandense Shield area of southernmost Brazil, have been analyzed here in terms of facies associations and tectonic significance. The investigated unit comprises conglomerates, sandstones, and siltstones, deposited probably under continental semi-arid climate conditions, in the post-collisional stages of Neoproterozoic Brasiliano/Pan-African Cycle. The location of the alluvial deposits suggests that the depositional locus of this sedimentary unit should probably consist of an individual and restricted fault

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Peryt, Danuta, and Tadeusz Peryt. "Environmental changes in the declining Middle Miocene Badenian evaporite basin of the Ukrainian Carpathian Foredeep (Kudryntsi section)." Geologica Carpathica 60, no. 6 (December 1, 2009): 505–17. http://dx.doi.org/10.2478/v10096-009-0037-9.

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Environmental changes in the declining Middle Miocene Badenian evaporite basin of the Ukrainian Carpathian Foredeep (Kudryntsi section) The Kudryntsi section in West Ukraine documents a major environmental change from hypersaline to marine conditions during the Middle Miocene. There are very few (or no) specimens of foraminifers in samples of the siliciclastic series (4 m thick, with limestone intercalations) which occurs above the gypsum (and below the transgressive deposits) in the southern part of quarry. The limestone intercalations are first sparitic and microsparitic, and then become pel

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Haslett, Simon K. "An Ipswichian foraminiferal assemblage from the Gwent Levels (Severn Estuary, UK)." Journal of Micropalaeontology 16, no. 2 (October 1, 1997): 136. http://dx.doi.org/10.1144/jm.16.2.136.

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Abstract. Andrews et al. (1984) documented the occurrence of palaeo-beach deposits underlying Holocene alluvium at Llanwern, inland on the Caldicot (Gwent) Levels near Newport. These deposits at Llanwern (ST360872) lie at −3.6 to −4 m OD and were studied by Andrews et al. (1984) from borehole samples only. The sediments comprised sands and gravels with abundant intertidal and rocky shore molluscs suggesting a beach depositional setting, close to an intertidal lagoon. Locke (1971) also noted the widespread occurrence of coarse basal sands and gravels underlying the Holocene deposits of the Cald

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Reale, Enrico, Stephanie Groos, Ute Eckardt, Claus Eckardt, and Liliana Luciano. "New Components of ‘Basal Laminar Deposits’ in Age-Related Macular Degeneration." Cells Tissues Organs 190, no. 3 (2009): 170–81. http://dx.doi.org/10.1159/000187632.

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Molnia, Bruce F., Austin Post, and Paul R. Carlson. "20th-century glacial-marine sedimentation in Vitus Lake, Bering Glacier, Alaska, U. S. A." Annals of Glaciology 22 (1996): 205–10. http://dx.doi.org/10.3189/1996aog22-1-205-210.

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Vitus Lake, the ice-marginal basin at the southeastern edge of Bering Glacier, Alaska, U.S.A., is a site of modern, rapid, glacial-marine sedimentation. Rather than being a fresh-water lake, Vitus Lake is a tidally influenced, marine to brackish embayment connected to the Pacifie Ocean by an inlet, the Seal River. Vitus Lake consists of five deep bedrock basins, separated by interbasinal highs. Glacial erosion has cut these basins as much as 250 m below sea level. High-resolution seismic reflection surveys conducted in 1991 and 1993 of four of Vitus Lake’s basins reveal a complex, variable thr

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Molnia, Bruce F., Austin Post, and Paul R. Carlson. "20th-century glacial-marine sedimentation in Vitus Lake, Bering Glacier, Alaska, U. S. A." Annals of Glaciology 22 (1996): 205–10. http://dx.doi.org/10.1017/s0260305500015433.

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Vitus Lake, the ice-marginal basin at the southeastern edge of Bering Glacier, Alaska, U.S.A., is a site of modern, rapid, glacial-marine sedimentation. Rather than being a fresh-water lake, Vitus Lake is a tidally influenced, marine to brackish embayment connected to the Pacifie Ocean by an inlet, the Seal River. Vitus Lake consists of five deep bedrock basins, separated by interbasinal highs. Glacial erosion has cut these basins as much as 250 m below sea level. High-resolution seismic reflection surveys conducted in 1991 and 1993 of four of Vitus Lake’s basins reveal a complex, variable thr

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44

Mandal, Shramana, and Bhawana A. Badhe. "Malignant Transformation in a Mature Teratoma with Metastatic Deposits in the Omentum: A Case Report." Case Reports in Pathology 2012 (2012): 1–3. http://dx.doi.org/10.1155/2012/568062.

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Malignant transformation of a mature cystic teratoma (MCT) is a very rare complication with an incidence of 0.17–2%;. The most common form of malignant transformation of the MCT is squamous cell carcinoma. Other tumors arising in MCT include basal cell carcinoma, sebaceous tumor, malignant melanoma, adenocarcinoma, sarcoma, and neuroectodermal tumor. However malignant transformation with metastatic deposits in the omentum is extremely rare. The present case highlights the rarity of the occurrence of an omental deposits in a case of mature cystic teratoma with malignant transformation.

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Ampe, Carole. "The Quaternary Stratigraphy of a Section of the Sibowe River, South-West Swaziland." Afrika Focus 7, no. 3 (January 26, 1991): 225–40. http://dx.doi.org/10.1163/2031356x-00703003.

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In south-west Swaziland a river terrace along the Sibowe river is formed by active river incision. A complex profile along this terrace showing alluvial and colluvial deposits reflecting changes in environmental conditions since at least the last 30000 years is exposed. Examination of soil characteristics, relative position of the composite strata as well as river dynamics leads to a stratigraphic interpretation which has been fitted into a time frame. The basal gravel, alluvial in nature, dates from before the deposition of the Mphunga colluvium which has been deposited between 30 300 and 849

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Toomey, Christopher B., Una Kelly, Daniel R. Saban, and Catherine Bowes Rickman. "Regulation of age-related macular degeneration-like pathology by complement factor H." Proceedings of the National Academy of Sciences 112, no. 23 (May 19, 2015): E3040—E3049. http://dx.doi.org/10.1073/pnas.1424391112.

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Complement factor H (CFH) is a major susceptibility gene for age-related macular degeneration (AMD); however, its impact on AMD pathobiology is unresolved. Here, the role of CFH in the development of AMD pathology in vivo was interrogated by analyzing aged Cfh+/− and Cfh−/− mice fed a high-fat, cholesterol-enriched diet. Strikingly, decreased levels of CFH led to increased sub-retinal pigmented epithelium (sub-RPE) deposit formation, specifically basal laminar deposits, following high-fat diet. Mechanistically, our data show that deposits are due to CFH competition for lipoprotein binding site

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Triantaphyllou, M. V. "CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY OF LANGHIAN DEPOSITS IN LEFKAS (IONIAN ISLANDS)." Bulletin of the Geological Society of Greece 43, no. 2 (January 23, 2017): 754. http://dx.doi.org/10.12681/bgsg.11241.

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Spanochorion composite section (NE Lefkas) and Aghios Vassilios section (W Lefkas) have been studied semiquantitatively for their calcareous nannofossil content. The calcareous nannofossil biostratigraphy, performed at the Paxos unit atypical flysch sediments of Aghios Vassilios section, permits their biostratigraphic correlation with the uppermost part of NN4 biozone and the lower part of NN5 biozones (Martini, 1971) or MNN4b and MNN5a (Fornaciari and Rio, 1996), which chronostratigraphically point to Early Langhian age and range between 15.974 and 14.53 Ma. Τhe most interesting biostratigrap

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Luberti, Gian Marco, Francesca Vergari, Alessia Pica, and Maurizio Del Monte. "Estimation of the thickness of anthropogenic deposits in historical urban centres: An interdisciplinary methodology applied to Rome (Italy)." Holocene 29, no. 1 (October 15, 2018): 158–72. http://dx.doi.org/10.1177/0959683618804630.

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In historical urban centres, the superimposition of excavation and deposition activities over time has resulted in an irregular spatial distribution of anthropogenic deposits, which may reach considerable thicknesses. The detection of those thicknesses requires extensive investigations. Broad borehole and geophysical campaigns cost time and money, consequently at the urban-planning level, it is usual to shift to an estimation of thicknesses, which may be performed through map-algebra operations, that is, by subtracting from the modelled ground surface the elevation of the anthropogenic-deposit

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Ivanov, D. V., V. V. Ivanov, and A. V. Tolstov. "THE FEATURES OF THE INDICATOR MINERALS OF KIMBERLITES IN A NEW PIPE YANVARSKAJA (WESTERN YAKUTIA)." Proceedings of higher educational establishments. Geology and Exploration, no. 5 (October 28, 2017): 20–26. http://dx.doi.org/10.32454/0016-7762-2017-5-20-26.

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The first results of the mineral-petrographic studies of microclastes of kimberlites from the basal horizon of the Upper Paleozoic deposits of the Alakit-Markhinsky kimberlite field (Western Yakutia) have been presented. The main features of the indicator minerals of kimberlites (IMK) have been revealed. These minerals are picroilmenite, pyrope, chromspinels, phlogopite, chromdiopside and olivine. The ways of their further studying in connection with the search for kimberlite bodies have been outiined. The opening of the Yanvarskaja pipe has confirmed the correctness of the methodology for tes

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Zanchetta, Giovanni, Marta Pappalardo, Alessio Di Roberto, Monica Bini, Ilenia Arienzo, Ilaria Isola, Adriano Ribolini, et al. "A Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)." Andean Geology 48, no. 2 (May 31, 2021): 267. http://dx.doi.org/10.5027/andgeov48n2-3290.

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In this paper we illustrate the stratigraphy, geochronology, and geochemistry (major, minor, trace elements and Sr-isotopes) of a Holocene tephra layer found within coastal sedimentary deposits north of Caleta Olivia (Santa Cruz Province, Argentina). The stratigraphic succession comprises beach deposits with basal erosive surface resting on the local substrate (“Formación Patagonia”) followed by a poorly developed paleosoil. The paleosoil is covered by a lenticular fine-grained (Mdφ: 5.2, 0.027 mm), well sorted (σφ: 1.2) volcanic ash layer and aeolian sands. The geochemical composition of shar

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