Results 281 to 290 of about 4,634,599 (340)
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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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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.
D. Pearson
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Earth-Science Reviews, 2010
Abstract This paper proposes a global review of Hirnantian event stratigraphy. The Hirnantian GSSP in south China is tentatively correlated with latest Ordovician strata from the peri-Gondwanan “glacial” regions. Problems of biostratigraphical correlation are highlighted.
Delabroye A, VECOLI, MARCO
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Abstract This paper proposes a global review of Hirnantian event stratigraphy. The Hirnantian GSSP in south China is tentatively correlated with latest Ordovician strata from the peri-Gondwanan “glacial” regions. Problems of biostratigraphical correlation are highlighted.
Delabroye A, VECOLI, MARCO
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Geological Magazine, 1983 Summary. Pleistocene deposits exposed at Alton Road Quarry, Farnham in 1980 have been sub-divided into two formal stratigraphical units of ‘member’ status. The ‘Wrecclesham Gravel’ is the lowest unit and consists primarily of fluvial sands and gravels.
Ian Bryant +4 more
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Contributions to Mineralogy and Petrology, 1992
The 1500 m thick sequence of Huronian continental volcanics at Thessalon, Ontario is subdivided into 4 volcanic cycles, each of which includes abundant early mafic end-members, central intermediate flows, and late rhyolite units. Major and trace element concentrations are dominated by extensive gabbroic fractionation trends that ultimately produced two
Dickin, A. P., Jolly, W. T., Wu, T.-W.
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The 1500 m thick sequence of Huronian continental volcanics at Thessalon, Ontario is subdivided into 4 volcanic cycles, each of which includes abundant early mafic end-members, central intermediate flows, and late rhyolite units. Major and trace element concentrations are dominated by extensive gabbroic fractionation trends that ultimately produced two
Dickin, A. P., Jolly, W. T., Wu, T.-W.
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Stratigraphy of the Wisconsin Glacial Stage along the Northwestern Shore of Lake Erie
Science, 1957A. Dreimanis
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Stratigraphy of the Ordovician Ashgillian Stage of Western Mongolia
International Geology Review, 1980(1980). Stratigraphy of the Ordovician Ashgillian Stage of Western Mongolia. International Geology Review: Vol. 22, No. 5, pp. 575-586.
Ch. Minzhin, Kh. S. Rozman
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Moscow University Geology Bulletin, 2020
The study of the foraminiferal communities from the Paleogene–Neogene reference section at Kvachina Bay in West Kamchatka has made it possible, based on the qualitative composition and the quantitative ratios of the encountered species, to identify 13 layers with foraminifera corresponding to certain intervals of the section and to establish their ...
N. A. Fregatova +3 more
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The study of the foraminiferal communities from the Paleogene–Neogene reference section at Kvachina Bay in West Kamchatka has made it possible, based on the qualitative composition and the quantitative ratios of the encountered species, to identify 13 layers with foraminifera corresponding to certain intervals of the section and to establish their ...
N. A. Fregatova +3 more
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Moscow University Bulletin. Series 4. Geology, 2020
The study of the paleocommunities of foraminifera of the reference section of the Paleogene-Neogene of the Kvachin Bay in Western Kamchatka made it possible, based on the qualitative composition and quantitative ratios of the species encountered, to identify 13 layers with foraminifera corresponding to certain section intervals and to establish their ...
N. A. Fregatova +2 more
openaire +2 more sources
The study of the paleocommunities of foraminifera of the reference section of the Paleogene-Neogene of the Kvachin Bay in Western Kamchatka made it possible, based on the qualitative composition and quantitative ratios of the species encountered, to identify 13 layers with foraminifera corresponding to certain section intervals and to establish their ...
N. A. Fregatova +2 more
openaire +2 more sources