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Showing 1 to 20 of 98 for “"Upper Cretaceous"”.
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Benthonic foraminiferida of the Niobrara formation (Upper Cretaceous) at Pueblo, Colorado
Includes bibliographical references.
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Stratigraphy and Planktonic Foraminifera of the Upper Cretaceous Selma Group, Alabama
Made available in DSpace on 2015-05-12T22:33:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7105173.PDF: 11717544 bytes, checksum: 7747e5bbc77b7cbe83c79258898743a8 (MD5) Previous issue date: 1970
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Examining the Molluscan Biostratigraphy of the Upper Cretaceous Judith River Formation, Montana
<p>The "Judith River beds" were discovered by F.V. Hayden in 1855. F.B. Meek helped classified the specimens that Hayden had collected. In the documentations Meek and Hayden, the specimens were collected from the “Judith River Badlands.”' There was no documentation on where in the Judith River …
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Molluscan paleontology of the Pierre Shale (Upper Cretaceous), Bowman County, North Dakota
<p> The Pierre Shale of Campanian and Early Maestrichtian age in Bowman County, southwestern North Dakota, has an abundant molluscan fauna and 51 species are described herein. The 51 species consist of 1 species of scaphopod, 13 species in 11 genera of gastropods, 24 species' in 17 genera of …
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Foraminifera from outcrops of the Pierre Shale (Upper Cretaceous) of North Dakota
… of North Dakota the Pierre is overlain by later Cretaceous and Tertiary sediments, but to the east of the Missouri River, where it forms the bedrock, it is mantled by glacial drift. However, numerous exposures of the Pierre are present, generally in road cuts and river valleys of the southwestern …
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Bivalvia and paleoecology of the Fox Hills Formation (Upper Cretaceous) of North Dakota
… which is essentially devoid of bivalves. The uppermost member, the Colgate, consists of light colored greywacke sandstone. </p><p> Forty-two species of bivalves were identified from the Fox Hills Formation in North Dakota and arranged in twenty-five genera. This number included three new …
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Upper cretaceous and lower cenozoic foraminifera of three oil wells in northwestern Iraq
… applicable. The foraminiferal fauna from the upper part of the Shiranish Formation prove to be of Maestrichtian age. The Mesozoic-Cenozoic boundary is recognized on the basis of "smaller foraminiferal" faunal assemblages; it is placed between the Maestrichtian and the Danian Stages. The Aaliji …
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Stratigraphy of the Upper Cretaceous Frontier sandstone, North Park Basin, Jackson County, Colorado
Includes bibliographical references.
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Organic-walled microplankton paleoecology and biostratigraphy of the Upper Cretaceous Ripley Formation, southwestern Georgia
… chlorophyte, and acritarch cysts from the Upper Cretaceous upper Cusseta, Ripley, and lower Providence Formations in the USGS Fort Gaines core, drilled in Clay County, Georgia. A total of 75 taxa were identified, consisting of 36 genera, 61 species, and 5 subspecies of dinoflagellates, 3 …
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Palaeoecology and taxonomy of the macrobenthic fauna from the Upper Cretaceous Ajlun Group, southern Jordan
The Upper Cretaceous Ajlun Group (Cenomanian-Turonian) of southern/south-eastern Jordan has been analysed in 15 detailed sections with thicknesses between 40 m and 200 m. Taxonomic, palaeoecological, taphonomic, and sedimentological aspects were taken into account. During the early Upper Cretaceous …
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A Foraminiferal Biostratigraphy of the Upper Cretaceous of the Southern North Sea Basin (UK Sector).
… units of the Dutch and British sectors of the Upper Cretaceous of the Southern North Sea Basin are recognised from Gamma Ray and Formation Density wireline log signitures (where available); these are the Chalk Group and the Texel and Ommelanden Formations. . The biozones are related to the …
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Stratigraphy and depositional environments of the Fox Hills Formation (Upper Cretaceous), Bowman County, North Dakota
… structures, trace fossils, and lithology of the Upper Cretaceous Fox Hills Formation in Bowman County, North Dakota, were studied during the summer of 1979 and the spring of 1983. Twenty-three stratigraphic sections were measured and described and lithologic samples were collected for textural …
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Stratigraphic model for the Upper Cretaceous (Campanian) Hygiene member, Pierre shale, west Denver Basin, Colorado
Includes bibliographical references (pages 93-96).
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Litho- and Biostratigraphic analysis of the Upper Cretaceous Carlile and Niobrara formations in southern Saskatchewan, Canada
… same area is a stratigraphic equivalent of the upper Carlile subunit. The Niobrara Formation in south-central and southeastern Saskatchewan is subdivided into the lower Calcareous Shale Member and the upper First White Specks Member. Seven foraminiferal zones and three subzones were recognized …
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Origin and distribution of selenium in the upper Cretaceous Niobrara and Pierre formations, northeastern North Dakota
… contact of the Niobrara and Pierre Formations of Cretaceous age in northeastern North Dakota. A 64-foot section in the Pembina Hills area reveals that the highest selenium content occurs in shale and marlstone beds adjacent to the bentonite beds which, themselves, contain comparatively little …
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The petrology of clay-rich beds in the Turonian (Upper Cretaceous) of the Anglo-Paris Basin
Clay-rich beds ('marl bands') in the Turonian of the Anglo-Paris Basin are primary features reflecting a sudden, sharp increases in non-carbonate deposition on the sea-floor. They differ from omission surfaces because they are not rhythmic, and usually only occur during eustatic falls in sea level. …
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A Potential Long-lived Upper Cretaceous Paleodrainage System In The U.s. Southwestern Georgia-southeastern Alabama Region
… of one or more large paleovalleys in the Upper Cretaceous sub-Coastal Plain surface that occupy a similar position to a paleodrainage system identified in the overlying Eutaw Formation. Characteristics ofthe Eutaw Formation indicate recycling of Tuscaloosa sediments in addition to …
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