Results 221 to 230 of about 3,284 (255)
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Carbon isotope stratigraphy and the problem of a pre-Tommotian Stage in Siberia
Geological Magazine, 2001Carbon isotopic oscillations are useful to elucidate the stratigraphy and biogeochemical events around the Precambrian–Cambrian transition. New isotopic data from the Manykaj and Emyaksin formations of the eastern Anabar Uplift (Siberia) help to correlate the Lower Cambrian and Neoproterozoic–Cambrian transitional beds across the Siberian Platform ...
ARTEM KOUCHINSKY +5 more
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Climate, environment and stratigraphy of the last Pleistocene glacial stage in Poland
Quaternary International, 2016Abstract The aim of the paper is to present general characteristics of the climate in Poland during the Vistulian (Weichselian), expressed by changes of its continentality during warm and cold intervals. This last glacial stage in Poland is commonly subdivided into Early Vistulian (MIS 5d-a), Lower Plenivistulian (MIS 4), Interplenivistulian (MIS 3),
Leszek Marks +2 more
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Definition of Late Cretaceous Stage Boundaries in Antarctica Using Strontium Isotope Stratigraphy
The Journal of Geology, 2000Abstract New 87Sr/86Sr analyses of macrofossils from 13 key marker horizons on James Ross and Vega Islands, Antarctica, allow the integration of the Antarctic Late Cretaceous succession into the standard biostratigraphic zonation schemes of the Northern Hemisphere. The 87Sr/86Sr data enable Late Cretaceous stage boundaries to be physically located with
McArthur, J.M. +2 more
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New data on ammonites and stratigraphy of the Volgian stage in Spitzbergen
Stratigraphy and Geological Correlation, 2010The stratigraphy of the Volgian in Spitzbergen is refined based on the new fossil collections. The lower Volgian is poorly characterized by ammonites being not subdivided into zones, and the only recognized stratigraphic unit within it are the Beds with Paravirgatites sp. in the upper part of the lower Volgian.
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Ordovician series and stages in Chinese stratigraphy: steps toward a global usage
Alcheringa: An Australasian Journal of Palaeontology, 2001The first Chinese Ordovician series was erected by Lee & Chao (1924). Since then, many regional Ordovician series and stage names have been established and mostly published in Chinese. The present study is a review of these regional units with a discussion of their definitions and correlation to the international standard. Among them, the Ichang series,
Chen Xu +3 more
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Cambrian stratigraphy and stage subdivision in the Holy Cross Mountains, Poland
Geological Magazine, 1992AbstractThe lithostratigraphic and biostratigraphic subdivisions of the Cambrian sequence in the Holy Cross Mountains of Poland are briefly presented and discussed. In accordance with recent progress in Cambrian stratigraphy and correlation in Great Britain and Scandinavia, a new proposal for chronostratigraphic stages is made.
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The Bashkirian Stage of Southwestern Darvaz, the Pamir Mountains: Stratigraphy and paleotectonics
Stratigraphy and Geological Correlation, 2012Sections of the Bashkirian Stage of Southwestern Darvaz (the Pamir Mountains) are described. Based on fusulinids, the presence of all four Bashkirian substages was established. The Bashkirian beds transgressively overlie clastic-volcanic series of the Lower Carboniferous, and are conformably overlain by the Moscovian (Vereian).
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Problems of Rhaetian stratigraphy with special reference to the lower boundary of the stage
Quarterly Journal of the Geological Society of London, 1970The use of ‘Rhaetic’ as an international lithostratigraphical term is rejected in favour of a national terminology. The establishment, type-region and a possible standard section for the Rhaetian, and a marker point for its base are discussed.
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The stratigraphy of the Callovian and Oxfordian stages (Middle-Upper Jurassic) in northern Scotland
Scottish Journal of Geology, 1975Synopsis Outcrops of Middle-Upper Jurassic rocks in northern Scotland are restricted to two sedimentary basins. In the east exposures at Brora (Sutherland) and Balintore (Ross-shire) are part of the Moray Firth basin. In the west major exposures at Staffin and in Strathaird (Isle of Skye) belong to the Minch basin.
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Proceedings of the Yorkshire Geological Society, 2007
SUMMARY The recent suggestion that no warm-stage deposits have yet been found separating glacial sediments in lowland southern and eastern Britain is shown to be incorrect. At Morston, on the coast of north Norfolk, an ancient beach succession with a temperate pollen assemblage rests upon till closely comparable with the Marly Drift, usually ...
Gale, Stephen, Hoare, Peter
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SUMMARY The recent suggestion that no warm-stage deposits have yet been found separating glacial sediments in lowland southern and eastern Britain is shown to be incorrect. At Morston, on the coast of north Norfolk, an ancient beach succession with a temperate pollen assemblage rests upon till closely comparable with the Marly Drift, usually ...
Gale, Stephen, Hoare, Peter
openaire +3 more sources