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Showing 1 to 19 of 19 for “"claystone"”.
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The Twiggs Clay: mineralogy, origin, and industrial properties of an upper Eocene opaline claystone in the coastal plain province of Georgia, U.S.
The Twiggs Clay is an upper Eocene claystone found as discontinuous deposits downdip of the Fall Line in the Coastal Plain Province of eastern and central Georgia. A distinctive facies of the Twiggs is found in two lenses near the town of Wrens. The nature, origin, and potential commercial …
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Paleoecology of a late quaternary biota at the McClusky Canal Site, central North Dakota
… pebbly, clayey sand; (2) unlaminated, organic claystone; (3) laminated, organic claystone; (4) pebbly, sandy claystone; (5) laminated, organic claystone; (6) gypsiferous claystone; and (7) silty claystone. Units 1 and 4 are inter preted to be till, and the remainder are lacustrine sediments. …
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Stratigraphy and Structure of the Miocene "Esmeralda" Formation in Stewart Valley, Mineral County, Nevada
… part of this formation contains small lacustrine claystone deposits (unit 1) that interfinger with volcanic breccias and flows (unit 2). The main fluvio-lacustrine sequence is above the flows and·is divided by the author into five units based on lithology: sandstone and claystone in unit 3, shale …
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Stratigraphy and sedimentary history of middle Cenozoic (Oligocene and Miocene) deposits in North Dakota
… 125 to 560 feet of cross-bedded sandstone, clay, claystone, silty claystone, siltstone, and minor limestone and dolostone, spanning Chadronian (early Oligocene) through Arikareean (early Miocene) times.</p> <p>The Chadron and Brule Formations of the White River Group are recognized in North …
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The stratigraphy of the Sperati Point Quadrangle, McKenzie County, North Dakota
… section is dominantly gray, yellow, and brownish claystone, siltstone, shale and lignite. Characteristic sedimentary structures are "cannonball" and "log-lL-e" siltstone and c aystone concretions. A blue bentonitic claystone, the "blue bed", which occurs about 200 feet below the top of the member, …
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Numerical simulations of site response and seismic settlements at Kashiwazaki-Kariwa Nuclear Power Plant, Japan
… in LS-DYNA. The Service Hall site consists of claystone overlain by loose sand whereas Arahama site has dense sand deposits on top of claystone. The comparison of measured and computed responses at the Service Hall vertical array site showed that the simulations captured the spectral responses. …
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Investigating potential climatic cycles in glacially-influenced rhythmites of the upper Gowganda Formation using geochemical, sedimentological and spectral analyses
… and sandstone, 4) interbedded siltstone and claystone, 5) sandstone, 6) siltstone, 7) interbedded coarse-grained and fine-grained siltstone, and 8) wavy argillite. Major, trace, and rare earth element analyses indicate that the rhythmites have undergone limited recycling and chemical …
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Molluscan paleontology of the Pliocene Peace Valley "beds" and Ridge Route "formation" (Ridge Basin group), Ridge Basin, southern California
… Basin molluscs occur in sediment ranging from claystone to conglomerate although the majority of the molluscan fauna is found in siltstone, very fine-grained wacke, and claystone. The lack of molluscs in the mudstone of the lower Peace Valley "beds" (lacustrine facies), and the presence of the …
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Stratigraphy and sedimentology of the Tongue River formation (Paleocene), southeast Golden Valley County, North Dakota
… very fine-grained sandstone, siltstone, claystone, shale, and lignite. The overlying Sentinel Butte Member is 450 feet thick and composed of yellow-brown, fine to medium-grained sandstone, siltstone, and lignite.</p> <p>The lower member was found to be lighter colored, to have a higher …
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Estratigrafia de sequências do intervalo aptiano ao albiano na Bacia do Araripe, NE do Brasil
… represented by pebble, sandstones, claystones, margas and evaporates; these facies are associated in order to characterize different depositional systems, that integrate from the continental environment (fluvial system and lacustre), paralic system (delta system and lagunar) to the …
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Paleoecology of late quaternary Molluscan-Ostracod assemblages from the Norwood site, southeastern Minnesota
… units, in ascending order, were: (1) sandy claystone, (2) clayey siltstone, (3) sandy siltstone, and (4) laminated peat. Unit 1 was interpreted to be till or sediment that slumped or flowed into the lake. Unit 2 and the lower part of unit 3 were interpreted to be lacustrine sediments. The …
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Advancing Lithium Extraction from Nevada’s Sedimentary Claystones: Hydrometallurgical Pathways and Sustainability Perspectives
… constraints. Sedimentary lithium-bearing claystones in Nevada represent one of the most strategically important domestic alternatives, however, lithium in these deposits is generally incorporated within the octahedral layers of phyllosilicate clay minerals, principally illite, smectite, …
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Petrology of the Sentinel Butte Formation (Paleocene), North Dakota
… of the Sentinel Butte bentonite/ash with other claystone units may yet reveal the presence of other bentonites in Paleocene strata. Chemical correlation of newly discovered bentonites may lead to an improved understanding of the time-stratigraphic framework of the Fort Union Group. </p><p> …
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THE STRATIGRAPHIC POSITION OF FOSSIL VERTEBRATES FROM THE POJOAQUE MEMBER OF THE TESUQUE FORMATION (MIDDLE MIOCENE, LATE BARSTOVIAN) NEAR ESPAÑOLA, NEW MEXICO
… analyses. After x-ray diffraction analyses of claystones within lithosome B, mordenite was discovered, which is a zeolite mineral commonly found within volcanic rocks. This is significant because the presence of mordenite confirms Cavazza’s (1986) conclusion that lithosome B was sourced by the …
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Sedimentology of the Bullion Creek and Sentinel Butte formations (Paleocene) in a part of southern McKenzie County, North Dakota
… analyses of sand stones, limestones, and claystones, respectively.</p> <p>Two paleochannel systems are present in the Bullion Creek Formation in the study area. These systems are deeply incised and vertically stacked, with low width/depth ratios. Primary sedimentary structures within the …
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Depositional environments and sandstone diagenesis in the Tyler Formation (Pennsylvanian), western North Dakota
… consists of varicolored mudstone, medium-gray claystone, thin bituminous coal beds, dark-gray shale and limestone, and gray sandstone. The upper unit of the Tyler Formation in southwestern North Dakota consists of gray sandstone, dark-gray limestone and shale, and varicolored mudstone.</p> …
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A survey of 24 elements in North Dakota lignite (Fort Union Group, Paleocene) and possible geologic implications
… Creek Formation--Harmon Bed (Bowman County). Claystone samples were also collected from clay partings present in the Hagel Bed and Harmon Bed. Control samples were collected from an outcrop of the marine lower middle Cannonball Formation (carbonaceous shale) south of Mandan, North Dakota and …
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Deposition, stratigraphy, provenance, and reservoir characterization of carbonate mudstones: the Three Forks Formation, Williston Basin
… intrashelf deposits defined by disturbed claystone, dolomudstone, sandstone, laminated mudstone, and distorted to brecciated dolomudstone lithofacies. These lithofacies often contain syneresis cracks, desiccation cracks, high depositional rate features such as convolute bedding and load …
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Výroba žárovzdorného ostřiva v šachtových pecích
Výpal žárovzdorných ostřiv probíhá v šachtových nebo rotačních pecích. Výchozí suroviny pro výpal jsou žárovzdorné jíly, jílovce a lupky. Před výpalem se provádí třídění a sítování suroviny, při kterém dochází ke vzniku jemných podílů jílů. Tento odpad je nepoužitelný pro výpal běžným způsobem v …