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Showing 1 to 14 of 14 for “"Cretaceous-Tertiary"”.
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Cretaceous-Tertiary boundary clays in central India
Not Available
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Dinoflagellate biostratigraphy of the Cretaceous-Tertiary boundary, Round Bay, Maryland
… of the assemblage changes suddenly at the Cretaceous-Tertiary boundary with thirteen species making the~r first appearance at or just above the boundary. Nineteen species cross the boundary and thirty-five species are restricted to the Cretaceous. The rather sudden change in the nature of …
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The benthonic foraminifera across the Cretaceous-Tertiary boundary in the Zin Valley, Negev, Israel
… Ein Mor (EM) and Hor HaHar (HH) containing the Cretaceous-Tertiary (K/T) boundary, have been analysed for benthonic foraminifera within the framework of nannofossil and planktonic foraminiferal zones.In Israel there exists section below the defined K/T boundary, containing the 'Danian' …
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Paleo-environmental conditions and tectonic settings of cretaceous-tertiary kaolins in the Eastern Dahomey and Niger Delta Basins in Nigeria.
The Cretaceous period marked the breaking up of Gondwana, giving rise to the separation of the African and South American continents with the subsequent emergence of the South Atlantic Ocean. Most correlation studies between the two continents with respect to paleoenvironmental conditions and …
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Paleoenvironmental Variability across the Cretaceous-Tertiary Boundary in the Alberta Foreland Basin, as Interpreted from Fluvial Deposits and Paleosols, Red Deer River Valley, Alberta, Canada.
… paleotectonic and paleopedogenic data across the Cretaceous-Tertiary (KT) boundary of south-central Alberta indicates fluvial aggradation and variability of paleosol morphology in response to foreland orogenesis. The depositional history records an evolution from amalgamated, multi-story, braided …
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The historical biogeography of terrestrial gamebirds (Aves: Galliformes)
… that stem galliforms originated only after the Cretaceous-Tertiary mass extinction event.
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The effects of mass extinction on escalation of the naticid gastropod predator-prey system at the Eocene-Oligocene
… hypothesis. However, previous studies from the Cretaceous-Tertiary boundary found support for this hypothesis. On the basis of these different results, it can be concluded that the extinctions at the Eocene-Oligocene and the Cretaceous-Tertiary boundaries had fundamentally different effects on …
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PETROLOGIC AND GEOCHEMICAL ANALYSIS OF INTERMEDIATE TO MAFIC MAGNETITE-BEARING VOLCANIC FLOWS AND ASSOCIATED DIKES IN THE KNIGHT RANGE, GRANT COUNTY, NEW MEXICO
… is made up of a northeast-dipping package of Cretaceous-Tertiary volcanic, volcaniclastic, and sedimentary units. It is located in the Burro Uplift, south of the Tyrone mining district, at the intersection of the Mogollon-Datil volcanic field and the southern Basin and Range province. This …
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Palaeogene ostracods from the South African continental shelf
… genera and 3 species are common with the Upper Cretaceous faunas. 12 genera (18 species) are left in open nomenclature. The following genera are represented:- Bythoceratina, Incongruellina, Ruggieria, Eucythere, Krithe, Parakrithe, Eucytherura, Cytheropteron, Ambostracon, Urocythereis, …
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Geology of the Hanover Academy and Ashland quadrangles, Virginia
… Plain sediments east of the Fall Line are Cretaceous, Tertiary, and Quaternary in age. This province includes the Patuxent Formation (Cretaceous), the Aquia Formation (Paleocene), and the Marlboro Clay (Eocene), the St. Marys Formation (Miocene), the Brandywine Formation (Miocene), and the …
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Volcanic architecture of the Deccan Traps, western Maharashtra, India: an integrated chemostratigraphic and paleomagnetic study
… the lavas were emplaced around the time of the Cretaceous-Tertiary Boundary and because there is access to exposed lavas on three of its four sides, permitting investigation of the volcanic architecture in 3-D. Besides characteristics of the lava units, the logs include integrated geochemical …
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Campanian-Maestrichtian and Paleocene dinoflagellate and acritarch assemblages from the Maryland-Delaware Coastal Plain
The taxonomy and biostratigraphy of Upper Cretaceous and Paleocene dinoflagellate and acritarch assemblages from the Maryland-Delaware Coastal Plain have been investigated from strata outcropping near Washington, D.C., to the eastern end of the Chesapeake and Delaware Canal, Delaware. Samples of …