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Journal articles on the topic 'Sandstones of Seis'

Author: Grafiati

Published: 24 April 2022

Last updated: 30 July 2025

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1

Della Fávera, Jorge Carlos, Hernani Aquini Fernandes Chaves, Marco André Malmann Medeiros, et al. "STRATIGRAPHIC ANALYSIS OF THE ARATU STAGE (LOWER CRETACEOUS), RECÔNCAVO BASIN (BRAZIL), WITH HYDROCARBON RESERVOIR ROCKS." Journal of Sedimentary Environments 4, no. 2 (2019): 199–219. http://dx.doi.org/10.12957/jse.2019.43784.

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The section between the 7 and 11 electric markers in the Aratu Stage of the Recôncavo Basin (Lower Cretaceous) has been studied in order to perform a stratigraphic analysis. This section bear reservoir rocks known as Imbé, Cambuqui and Miranga sandstones. It produces petroleum in fields like Miranga, Araçás, Taquipe, Miranga Norte and Imbé.The isopach map showed a general trend of increased subsidence for south and southeast. A series of structural lows surround the platform region known as Quiricó High. Southwestward, the Taquipe Canyon is an indication of the lake deepening in that region.In

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Khalifazadeh, Ch M., S. Y. Hamashaeva-Muradova, and M. J. Hamashaeva. "Paleogeographical model of the late upper Pliocene eastern Azerbaijan and the Middle Kurin depression." Azerbaijan Oil Industry, no. 12 (December 15, 2024): 4–8. https://doi.org/10.37474/0365-8554/2024-12-4-8.

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The paleogeography of the late Pliocene is poorly studied. Meanwhile, more detailed studies of the paleogeography of the late Pliocene are of great importance for understanding the historical and geological development of the Pliocene-anthropogenic structural stage within the Southern Caspian and Eastern Azerbaijan. We have created a paleogeographic model based on the generalization of a huge amount of factual material - regional geophysical works, stratigraphic-paleontological data and complex sedimentological research.Late Upper Pliocene seas are characterized by their salinization and the d

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Pratt, Brian R., and Juan J. Ponce. "Sedimentation, earthquakes, and tsunamis in a shallow, muddy epeiric sea: Grinnell Formation (Belt Supergroup, ca. 1.45 Ga), western North America." GSA Bulletin 131, no. 9-10 (2019): 1411–39. http://dx.doi.org/10.1130/b35012.1.

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AbstractInterpreting the deposits of ancient epeiric seas presents unique challenges because of the lack of direct modern analogs. Whereas many such seas were tectonically relatively quiescent, and successions are comparatively thin and punctuated by numerous sedimentary breaks, the Mesoproterozoic Belt Basin of western North America was structurally active and experienced dramatic and continuous subsidence and sediment accumulation. The Grinnell Formation (ca. 1.45 Ga) in the lower part of the Belt Supergroup affords an opportunity to explore the interplay between sedimentation and syndeposit

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Richardson, Larry J., and Dennis E. Hedke. "Seismic Expression of a Subtle Stratigraphic Trap, Lexington Field, Clark County, Kansas." Bulletin (Kansas Geological Survey), no. 237 (April 16, 2024): 103–11. https://doi.org/10.17161/kgsbulletin.no.237.20432.

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Lexington field is located in northeastern Clark County, Kansas, principally in secs. 19 and 20, T. 31 S., R. 21 W. Geologically, the field is situated on the northeastern shelf of the Hugoton embayment of the Anadarko basin, near the eastern limit of Morrowan Stage deposition. The field has yielded over 4 million bbls of oil and about 4 BCF gas from combined Morrow and Mississippian reservoirs. Fluvial sandstones within the Morrow section are responsible for over 96% of the oil and about 75% of the gas produced from the field. Productive Morrow sandstones within the field were deposited in a

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Finney, Stanley C., and Raymond L. Ethington. "Graptolite and conodont faunas in Ordovician Vinini Formation, Roberts Mountains, central Nevada, demonstrate that the Roberts Mountains allochthon is not an exotic terrane." Paleontological Society Special Publications 6 (1992): 97. http://dx.doi.org/10.1017/s2475262200006572.

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Two very different plate-tectonic models have been proposed to explain the development and emplacement of the Robert Mountains allochthon (RMA) onto the North America craton during the Late Devonian-Early Mississippian Antler Orogeny. In one model, the RMA represents a far-traveled accretionary prism that migrated eastwards over a west-dipping subduction zone. In the other, the eugeoclinal strata of the RMA were deposited on the continental rise of western North America within a closed back-arc basin. Siliciclastic sediments, especially quartz sandstones, compose much of the RMA, yet knowledge

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Carr, Timothy R., Neil L. Anderson, and Tim Pulliam. "Case History of Walta Field (Simpson and Mississippian), Sumner County, Kansas." Bulletin (Kansas Geological Survey), no. 237 (April 16, 2024): 153–57. https://doi.org/10.17161/kgsbulletin.no.237.20438.

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Walta field (448 MBO) is a small field located in Sumner County, Kansas (principally in secs. 19 and 30, T. 33 S., R. 3 W., and sec. 25, T. 33 S., R. 4 W.). Cumulative production of 448 MBO is principally from a sandstone traditionally assigned to the uppermost Simpson Group (Middle Ordovician), but which may be Misener (Upper Devonian-Lower Mississippian), the basal transgressive sand below the Chattanooga Shale. Secondary production is from the Mississippian (Osagean) "chat" just beneath the sub-Pennsylvanian unconformity. Production at the Mississippian level is structurally trapped, but de

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Lovegrove, Jack, Andrew J. Newell, David I. Whiteside, and Michael J. Benton. "Testing the relationship between marine transgression and evolving island palaeogeography using 3D GIS: an example from the Late Triassic of SW England." Journal of the Geological Society 178, no. 3 (2021): jgs2020–158. http://dx.doi.org/10.1144/jgs2020-158.

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The Rhaetian transgression marked a major change in landscape. The Permian and Triassic had been a time of terrestrial conditions across Europe, including much of mainland UK, as well as the North Sea and Irish Sea, represented by red bed clastic successions. Seas flooded across Europe at 205.7 Ma and the shift from terrestrial to marine environments is marked in the UK by the switch from the red beds of the Mercia Mudstone Group to the black mudstones and shelly limestones and sandstones of the Penarth Group. The area around Bristol was marked by a complex landscape in which an archipelago of

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Ponciano, Luiza Corral Martins de Oliveira, Deusana Maria da Costa Machado, Ana Carolina Gelmini de Faria, Ana Carolina Maciel, Juliana Matos, and Mariana Novaes. "Hábitos de vida dos Gastropoda e Bellerophontida da formação Maecuru, Devoniano Médio, Bacia do Amazonas, Brasil." Anuário do Instituto de Geociências 30, no. 1 (2007): 197–203. http://dx.doi.org/10.11137/2007_1_197-203.

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The Maecuru Formation comprises the Devonian-Carboniferous sedimentary sequence of Amazonas Basin and consists of fluvialdeltaics to neritics sandstones and pelites layers. Its fossiliferous sediments (the uppermost part of the Lontra Member) consists of hummocky cross-stratified fine-grained to very coarse sandstones beds.With the purpose of adding more information about the palaeoecology of The Maecuru Formation fossils, the life habits of gastropods and bellerophontids were inferred based on functional analysis and similarities with the living forms. The more significant features used were:

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Langford, R. P., K. M. Pearson, K. A. Duncan, D. M. Tatum, L. Adams, and P. A. Depret. "Eolian Topography as a Control on Deposition Incorporating Lessons from Modern Dune Seas: Permian Cedar Mesa Sandstone, SE Utah, U.S.A." Journal of Sedimentary Research 78, no. 6 (2008): 410–22. http://dx.doi.org/10.2110/jsr.2008.045.

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Jeans, C. V., D. S. Wray, R. J. Merriman, and M. J. Fisher. "Volcanogenic clays in Jurassic and Cretaceous strata of England and the North Sea Basin." Clay Minerals 35, no. 1 (2000): 25–55. http://dx.doi.org/10.1180/000985500546710.

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AbstractThe nature and origin of authigenic clay minerals and silicate cements in the Jurassic and Cretaceous sediments of England and the North Sea are discussed in relation to penecontemporaneous volcanism in and around the North Sea Basin. Evidence, including new REE data, suggests that the authigenic clay minerals represent the argillization of volcanic ash under varying diagenetic conditions, and that volcanic ash is a likely source for at least the early silicate cements in many sandstones. The nature and origin of smectite-rich, glauconite-rich, berthierine-rich and kaolin-rich volcanog

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Reshetnyk, M., V. Gritsenko, and A. Martyshyn. "EVIDENCE OF THE BACTERIAL NATURE OF THE WENDOMAN ORGANISMS NEMIANA SIMPLEX." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (92) (2021): 6–10. http://dx.doi.org/10.17721/1728-2713.92.01.

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Nemiana simplex were found in Vendian deposits of Transnistria a hundred years ago. They are present in layers with determined age of 557 million. There are fourteen places with such fossils in the world. Nemiana simplex are the markers of all deposits of the Yampilian layers of the Vendian. We need to take a closer look at the Nemiana simplex analysis, as their exact nature has not been determined so far. They were considered to be raindrops, jellyfish or polyps, which is not justified. The large fluctuations in their size, and the peculiarities of their location relative to each other, indic

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Volkmer-Ribeiro, Cecília, Maria da Conceição Tavares-Frigo, Alexandre Cunha Ribeiro, and Maria Elina Bichuette. "Arinosaster patriciae (Porifera, Demospongiae): new genus and species and the second record of a cave freshwater sponge from Brazil." Neotropical Biology and Conservation 16, no. 1 (2021): 45–57. http://dx.doi.org/10.3897/neotropical.16.e50156.

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Arinosaster patriciae gen. nov. et sp. nov. is the second continental sponge registered for a subterranean environment (cave habitat) in Brazil and the Neotropical Region. The sponges were recorded and collected in a 5m depth technical dive in a sinkhole of Rio Claro, tributary of Rio Arinos, Tapajós system, Amazon Basin (-13.8170386, -56.6914225) at the locality of Sumidouro do Rio Claro, Municipality of Diamantino, state of Mato Grosso, central western Brazil. The cave is placed in sandstone rocks of the Parecis Group (Upper Cretaceous). “In situ” photographs of colonies, of living specimens

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Luo, Di, Yong Yuan, Jianwen Chen, Qing Li, Jie Liang, and Hualin Zhao. "Structural and Reservoir Characteristics of Potential Carbon Dioxide Storage Sites in the Northern South Yellow Sea Basin, Offshore Eastern China." Journal of Marine Science and Engineering 12, no. 10 (2024): 1733. http://dx.doi.org/10.3390/jmse12101733.

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The geological storage of carbon dioxide (CO2) in offshore saline aquifers stands as a primary option for reducing CO2 emissions in coastal regions. China’s coastal regions, particularly Shandong and Jiangsu provinces, face significant challenges in CO2 reduction. Therefore, evaluating the feasibility of CO2 geological storage in the adjacent seas is critical. To assess the suitability of a CO2 storage site, understanding its structural and reservoir characteristics is essential to mitigate injection and storage risks. In this study, we analyzed the structural characteristics and potential tra

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Davies, Neil S., Anthony P. Shillito, and Cameron R. Penn-Clarke. "Cold feet: Trackways and burrows in ice-marginal strata of the end-Ordovician glaciation (Table Mountain Group, South Africa)." Geology 48, no. 12 (2020): 1159–63. http://dx.doi.org/10.1130/g47808.1.

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Abstract New observations from an outcrop of Upper Ordovician Table Mountain Group strata (Matjiesgoedkloof, Western Cape Province, South Africa) have revealed an unexpected ichnofauna that is hosted within diamictites and sandstones that were deposited by a retreating low-latitude (∼30°S) ice sheet during the Hirnantian glaciation. The locality provides a rare window onto animal-sediment interactions in an early Paleozoic ice-marginal shallow-marine environment and contains a trace fossil community with a surprising ichnodiversity and ichnodisparity of burrows, trackways, and trails (Archaeon

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15

Zatoń, Michał, Melissa Grey, and Olev Vinn. "Microconchid tubeworms (Class Tentaculita) from the Joggins Formation (Pennsylvanian), Nova Scotia, Canada." Canadian Journal of Earth Sciences 51, no. 7 (2014): 669–76. http://dx.doi.org/10.1139/cjes-2014-0061.

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Microconchids have been described from the classic Pennsylvanian locality at Joggins, Nova Scotia. These encrusting tentaculitoid tubeworms have previously been mentioned and described from Joggins under the polychaete genus Spirorbis. Detailed morphological and microstructural investigation revealed that they belong to the species Microconchus carbonarius Murchison, confirming the previous tentative assignment (as Spirorbis carbonarius) made by Sir J. William Dawson in the nineteenth century. The occurrence of the same species in Upper Carboniferous deposits of England provides evidence suppo

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Buckman, Jim, Terry Donnelly, Zeyun Jiang, Helen Lewis та Alastair Ruffell. "Methane Derived Authigenic Carbonate (MDAC) Aragonite Cemented Quaternary Hardground from a Methane Cold Seep, Rathlin Basin, Northern Ireland: δ13C and δ18O Isotopes, Environment, Porosity and Permeability". Geosciences 10, № 7 (2020): 255. http://dx.doi.org/10.3390/geosciences10070255.

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A block of sandstone retrieved by divers from near Rathlin Island, Co. Antrim, Northern Ireland, represents an aragonite cemented sand formed during the Quaternary. Strongly negative δ13C of the aragonite cement (−50 to −60‰ δ13C) indicates that the hardground was formed by the anaerobic oxidation of methane (AOM), resulting in the formation of a methane-derived authigenic carbonate (MDAC) hardground. Such hardgrounds have previously been recorded as forming extensive pavements in deeper waters in the mid Irish Sea (e.g., Croker Carbonate Slabs), although the latter also contains high-magnesiu

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Andreev, Plamen, Michael I. Coates, Valentina Karatajūtė-Talimaa, et al. "The systematics of the Mongolepidida (Chondrichthyes) and the Ordovician origins of the clade." PeerJ 4 (June 16, 2016): e1850. http://dx.doi.org/10.7717/peerj.1850.

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The Mongolepidida is an Order of putative early chondrichthyan fish, originally erected to unite taxa from the Lower Silurian of Mongolia. The present study reassesses mongolepid systematics through the examination of the developmental, histological and morphological characteristics of scale-based specimens from the Upper Ordovician Harding Sandstone (Colorado, USA) and the Upper Llandovery–Lower Wenlock Yimugantawu (Tarim Basin, China), Xiushan (Guizhou Province, China) and Chargat (north-western Mongolia) Formations. The inclusion of the Mongolepidida within the Class Chondrichthyes is suppo

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18

Kos'ko, M., and E. Korago. "Review of geology of the New Siberian Islands between the Laptev and the East Siberian Seas, North East Russia." Stephan Mueller Special Publication Series 4 (September 17, 2009): 45–64. http://dx.doi.org/10.5194/smsps-4-45-2009.

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Abstract. The New Siberian Islands comprise De Long Islands, Anjou Islands, and Lyakhov Islands. Early Paleozoic, Mesozoic and Cenozoic sediments and igneous rocks are known on the De Long Islands. Cambrian slate, siltstone, mudstone and silicified limestone occur on Bennett Island. Ordovician volcanogenic turbidites, lavas, and small intrusions of andesite-basalt, basalt, dolerite, and porphyritic diorite were mapped on Henrietta Island. The igneous rocks are of calc-alkaline island arc series. The Ordovician age of the sequence was defined radiometrically. Early Paleozoic strata were faulted

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Torra, Roberto. "Ituzaingó Formation. A key for the interpretation of upper tertiary stratigraphy, Mesopotamia-Chaco Paraná Basin, Argentina." Ciência e Natura 21, no. 21 (1999): 139. http://dx.doi.org/10.5902/2179460x27024.

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Four years of sedimentological detailled study led me to reinterpretate the Upper Terriry Mesopotamia region stratigraphic squeme. Upon a detailed sedimentary environment analysis of the Mesopotamia – Chaco Paraná basin, I made a different interpretation about previous ideas of the several units present at this morphostructural domain. The Ituzaingo Formation was interpretated as continental (fluvial) in origin by several researchers based on an insecure fossil fauna of invertebrates, always present at the top of the layers. These fossil fauna his a broad and extend biochron over the Cenozoic

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Rose, Catherine V., Adam C. Maloof, Blair Schoene, et al. "The End-Cryogenian Glaciation of South Australia." Geoscience Canada 40, no. 4 (2013): 256. http://dx.doi.org/10.12789/geocanj.2013.40.019.

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The Elatina Fm. records the younger Cryogenian ice age in the Adelaide Rift Complex (ARC) of South Australia, which has long-held the position as the type region for this low-latitude glaciation. Building upon a legacy of work, we document the pre- and syn-glacial sedimentary rocks to characterize the dynamics of the glaciation across the ARC. The Elatina Fm. records an array of well-preserved glacial facies at many different water depths across the basin, including ice contact tillites, fluvioglacial sandstones, dropstone intervals, tidal rhythmites with combined-flow ripples, and turbidites.

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Huggett, Jennifer, Jacob Adetunji, Fred Longstaffe, and David Wray. "Mineralogical and geochemical characterisation of warm-water, shallow-marine glaucony from the Tertiary of the London Basin." Clay Minerals 52, no. 1 (2017): 25–50. http://dx.doi.org/10.1180/claymin.2017.052.1.02.

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AbstractGlaucony is present in the Palaeocene sediments of the London Basin, from the Thanet Sand Formation to the gravel beds at the base of the Lower Mottled Beds of the Reading Formation. The Upnor Formation glaucony is a rare example of formation in warm, shallow, brackish water and this, combined with the ready availability of fresh material from boreholes, make this study important in developing our understanding of this mineral. Glaucony comprises up to 50% of the Upnor Formation, a grey to green sandstone, of variable thickness and composition, which was deposited in awarm, shallow, ma

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Ver Straeten, Charles. "An introduction to the Devonian Period, and the Devonian in New York State and North America." Bulletins of American Paleontology, no. 403-404 (July 2023): 11–102. http://dx.doi.org/10.32857/bap.2023.403.03.

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The Devonian strata in New York State were the standard section for North America for over 100 years, and remain a significant reference for regional to global correlation and research. Since publication of L. V. Rickard’s (1975) New York Devonian correlation chart, various higher-resolution stratigraphic analyses have been employed, sometimes at bed-by-bed scale. These include sequence-, bio-, event-, chemo-, and other -stratigraphic approaches, along with increasingly finer-resolution geochronologic dating of airfall volcanic tephras. Results have led to many new interpretations and insights

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Louchart, Antoine, Cécile Mourer-Chauviré, Hassane Taisso Mackaye, Andossa Likius, Patrick Vignaud, and Michel Brunet. "The birds of the Djurab Pliocene faunas, Chad, Central Africa." Bulletin de la Société Géologique de France 175, no. 4 (2004): 413–21. http://dx.doi.org/10.2113/175.4.413.

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Abstract The Pliocene sites of the Djurab region (Chad, Africa) have yielded 19 avian remains. They belong to seven different taxa: a cormorant, Phalacrocorax cf. carbo, a darter, Anhinga cf. melanogaster, a heron (Ardeidae), a Ciconiidae of the tribe Leptoptilini, the size of the extant African species of marabou stork or Saddlebill, an extinct marabou stork (or adjutant) of large size – Leptoptilos sp. B, an Anserinae (swan or goose), and a duck (Anatinae). These birds indicate freshwater environments, a slow river or a lake. Also represented in the landscape were open as well as forested ar

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Ferreira, Júlio César, Emilson Pereira Leite, Marcos Alberto Rodrigues Vasconcelos, and Alvaro Penteado Crósta. "3D GRAVITY MODELING OF IMPACT STRUCTURES IN BASALTIC FORMATIONS IN BRAZIL: PART I – VARGEÃO, SANTA CATARINA." Revista Brasileira de Geofísica 33, no. 2 (2015). http://dx.doi.org/10.22564/rbgf.v33i2.723.

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ABSTRACT. In this paper, we present and discuss some geological characteristics and implications of a 3D subsurface mass density model of the Vargeão impact structure, constructed based on forward gravity modeling constrained by geological information. Vargeão is a complex structure formed by a meteorite impact in basalts of the Serra Geral Formation, with a central uplift exposing sandstones of Pirambóia/Botucatu Formations and impact breccias. There are only a few known examples of impact structures formed in basalts on the surface of the Earth, but they are common on other terrestrial plane

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Marsh, J. R., S. J. Jones, N. S. Meadows, and J. G. Gluyas. "Petrographic and diagenetic investigation of the distal Triassic ‘Budleighensis’ fluvial system in the Solway and Carlisle Basins for potential CO₂ storage." Petroleum Geoscience, March 23, 2022, petgeo2021–065. http://dx.doi.org/10.1144/petgeo2021-065.

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Failure to find hydrocarbon prospects in the Solway Basin region has resulted in a lack of research into the local Sherwood Sandstone Group petrography, reservoir quality and depositional history compared to the analogous southern reservoirs in the EISB which will be utilised for carbon storage. A detailed petrographic study is presented which aims to understand if the Solway Firth could have similar utility. The Permo-Triassic Sherwood Sandstone Group is believed to be deposited in depocentres connected during the Early Triassic by the extensive ‘Budleighensis’ fluvial system. Here, the Solwa

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Jasni, Nini Syaheera, Nor Roslina Rosli, Zafirah Zaidi, et al. "Low salinity waterflooding investigation using radioactive tracer in different sand pack configurations." Science, Engineering and Health Studies, December 28, 2023, 23020009. http://dx.doi.org/10.69598/sehs.17.23020009.

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Waterflooding is a simple secondary oil retrieval method practiced worldwide to assist and improve oil recovery. Consequently, understanding the flow behavior of the injected water is essential to ensure an efficient waterflooding process. Nevertheless, literature on utilizing radiotracers to investigate fluid flow behavior in oil reservoirs is limited. The current study observed and compared horizontal and vertical fluid flows in simulated sandstone reservoirs. Low salinity water of 500 ppm sodium chloride solution was injected into vertically and horizontally sand-packed columns at a flow ra

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Alms, Katharina, Maximilian Berndsen, Alicia Groeneweg, Marieke Graf, Mathias Nehler, and Benedikt Ahrens. "Underground Hydrogen Storage in the Bunter Sandstone Formation in the North German Basin: Capacity Assessment and Geochemical Modeling." Energy Technology, December 21, 2023. http://dx.doi.org/10.1002/ente.202300847.

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With planned hydrogen import terminals and production sites along the North and Baltic Seas, the German coast is likely to become the center of the hydrogen economy. Underground hydrogen storage in the sedimentary reservoirs of the region, particularly in the Bunter Sandstone Formation, could provide the required storage capacity for the future hydrogen economy due to its widespread occurrence and proven sealing system. Herein, the storage capacity is assessed using a probabilistic volume approach and possible reactions between the Bunter Sandstone and hydrogen based on geochemical simulations

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Behzad, Hayedeh, Hajime Ohyanagi, Badr Alharbi, et al. "A cautionary signal from the Red Sea on the impact of increased dust activity on marine microbiota." BMC Genomics 23, no. 1 (2022). http://dx.doi.org/10.1186/s12864-022-08485-w.

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Abstract Background Global climate change together with growing desertification is leading to increased dust emissions to the atmosphere, drawing attention to possible impacts on marine ecosystems receiving dust deposition. Since microorganisms play important roles in maintaining marine homeostasis through nutrient cycling and carbon flow, detrimental changes in the composition of marine microbiota in response to increased dust input could negatively impact marine health, particularly so in seas located within the Global Dust Belt. Due to its strategic location between two deserts and unique c

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Zea, Sven, Gladys Bernal, Gloria López, Marion Weber, and Rocío Del Pilar García-Urueña. "Arrecifes de arenisca en el Golfo de Salamanca, plataforma continental del Caribe colombiano." Bulletin of Marine and Coastal Research 48, no. 1 (2019). http://dx.doi.org/10.25268/bimc.invemar.2019.48.1.762.

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In tropical seas there are submerged hard bottoms that harbor corals but that are not coralline in origin. This is the case for the “Banco de las Ánimas” sector in the continental shelf of the Gulf of Salamanca, Colombian Caribbean. In its upper portion (14–16 m in depth), there are low mounds of sandstone blocks and slabs, conforming reefs, colonized by coralline biota and sparse corals. To confirm their lithology an initial petrographic analysis was carried out, which showed the rocks are made up of fine-grained sands, mature in texture, cemented by dolomite. It is proposed that these reefs

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Chen, Guoxiang, Zhibao Dong, Chao Li, et al. "Provenance of Aeolian Sediments in the Ordos Deserts and Its Implication for Weathering, Sedimentary Processes." Frontiers in Earth Science 9 (July 5, 2021). http://dx.doi.org/10.3389/feart.2021.711802.

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Identifying the provenance of aeolian deposits in semi-arid zones of China is beneficial in understanding Earth’s surface processes and helping to alleviate ecological stress. In this paper, we use grain-size, geochemical elements, heavy-minerals, and quartz grain morphology data to investigate the potential source of aeolian sands from the Ordos Deserts (Mu Us Sandy Land and Hobq Desert). Sedimentological, geochemical and geomorphological results indicate that significant provenance differences exist among various parts of the Mu Us Sandy Land, i.e., aeolian sediments from the southwest regio

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YAN, Songtao, Ailing DING, Xuejian DAI, et al. "Material Composition of the Newly Discovered Zongzhuo Formation Sedimentary Mélange in Dingri Area, Southern Tibet, and its Constraints on the Basin Controlling Dingri‐Gamba Fault." Acta Geologica Sinica - English Edition, May 18, 2024. http://dx.doi.org/10.1111/1755-6724.15170.

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AbstractThe study of sedimentary mélanges holds pivotal importance in understanding orogenic processes and unveiling geodynamic mechanisms. In this study, we present findings on zircon U‐Pb isotopes and whole‐rock elemental data concerning the recently uncovered Zongzhuo Formation sedimentary mélanges within the Dingri area. Field observations reveal the predominant composition of the Zongzhuo Formation, characterized by a matrix of sandstone‐mudstone mixed with sand‐conglomerates within native blocks exhibiting soft sediment deformation. Moreover, exotic blocks originating from littoral‐nerit

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Matilde, S. BERESI and Jessica C. GÓMEZ. "Hirnantian (Latest Ordovician) sponge spicules from the Precordillera at high latitudes of the Western Gondwana." May 15, 2023. https://doi.org/10.5281/zenodo.7926910.

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Resúmen: ESPÍCULAS DE ESPONJA HIRNANTIANAS (ORDOVÍCICO TARDÍO) DE LA PRECORDILLERA EN LATITUDES ALTAS DE GONDWANA OCCIDENTAL. Un conjunto de escasas espículas de esponjas desarticuladas han sido recuperadas de los planos de estratificación de lentes de arenisca finas con cemento carbonático de la Formación Don Braulio (Hirnantiano-Llandoveriano) en la Sierra de Villicum, Precordillera Oriental de la Provincia de San Juan, oeste de Argentina. Todas las espículas ocurren en un corto intervalo perteneciente a la biozona de Metabologra

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Zhang, Zhenyu, Lanying Han, Siqi Wang, et al. "Provenance of Taklimakan Desert aeolian sediments based on rare earth elements signatures." Earth Surface Processes and Landforms 50, no. 7 (2025). https://doi.org/10.1002/esp.70105.

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AbstractThe aeolian sediment source controls the formation and development of sand seas. The Taklimakan Desert is China's largest desert and contains diverse dune types. Their sediment sources have attracted much attention, but the sources are disputed: some believe that the Kunlun Mountains to the south are the sources, whereas others suggest that the Tianshan Mountains to the north are the sources. However, a lack of research on the spatial variation of the sand sources limits our understanding of the formation and evolution of the desert's landforms, which makes it difficult to predict, pre

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Braun, Carol-Ann, and Annie Gentes. "Dialogue: A Hyper-Link to Multimedia Content." M/C Journal 7, no. 3 (2004). http://dx.doi.org/10.5204/mcj.2361.

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Background information Sandscript was programmed with the web application « Tchat-scene », created by Carol-Ann Braun and the computer services company Timsoft (). It organizes a data-base of raw material into compositions and sequences allowing to build larger episodes. Multimedia resources are thus attributed to frames surrounding the chat space or to the chat space itself, thus “augmented” to include pre-written texts and graphics. Sandscript works best on a PC, with Internet Explorer. On Mac, use 0S9 and Internet Explorer. You will have to download a chat application for the site to functi

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