Results 251 to 260 of about 15,112 (291)
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Weichselian chronostratigraphy and correlations
Boreas, 1981The glacial history of the Fennoscandian ice cap beyond some 20,000 years B.P. is fairly poorly known because of the absence of a reliable dating control. The Eemian Interglacial of Europe is not dated at all. The Weichselian Glaciation seems to be characterized by three main glaciation maxima separated by two main interstadial periods (of quite ...
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Permian chronostratigraphy in Kansas
Geology, 1990Correlations between the type Permian System of Russia and North American strata have been difficult for decades because of biostratigraphic and nomenclatural confusion. Consequently, a standard Permian section was established in west Texas that is widely accepted throughout North America. Series of the North American standard section are, in ascending
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Chronostratigraphy beyond the GSSP
Stratigraphy, 2007The introduction of the GSSP concept has been successful to the extent that it has fostered a considerable amount of stratigraphic studies. It has also led to a re-thinking of stratigraphic principles and practices. Chronostratigraphy as practiced today attempts to reconcile two opposite philosophical principles, the rock-time model of Hedberg and the ...
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Chronostratigraphy of Upper Eocene Microspherules
PALAIOS, 1989Impact-glass microspherules occur at numerous localities in rocks that can be dated as late Eocene. There is debate as to whether the discovered microspherule layers are the result of two or three impact events. Standard biostratigraphic techniques have been employed to date the microspherule layers.
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Chronostratigraphie de l'Europe würmienne
Bulletin de l'Association française pour l'étude du quaternaire, 1968From recent data, the author strives to justify division of the Würm in three parts: Eowürm (75 000 B P. -55 000 B P.), Mesowürm (55 000 B. P. -27 000 B.P.), , Néowürm (27 000 B.P.-10 300 B P.). He tries to caracteris some great natural domains utilizing particularly mousterian and leptolithic settlements maps, « front pioneer » succeeding positions ...
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Mesozoic and Cenozoic Chronostratigraphy and Cycles of Sea-Level Change
, 1989B. Haq, J. Hardenbol, P. Vail
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