Results 161 to 170 of about 987 (207)

YUDOMIAN (VENDIAN) OF THE TYPE LOCALITY

Russian Geology and Geophysics, 1994
With new data obtained, the Yudomian Series (the Siberian Vendian) is characterized more precisely and more comprehensively in its type locality (Bol. Aim R. basin and near the Yudoma R. mouth). The new data corroborate the Tommotian age of the most ancient layers of the Pestrotsvet Formation in the region, which overlap here the Yudomian deposits with
V. V. Khomentovsky, G. A. Karlova
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Was Scotland a Vendian RRR junction?

Journal of the Geological Society, 1994
In Early Palaeozoic time northern Scotland occupied a 120° promontory between the Appalachian and Greenland Iapetus-facing margins of Laurentia. It is proposed that this originated at a triple rift (RRR) jundion between Laurentia and two other continents, possibly Baltica and West Gondwana.
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Chapter 12 Pre-Vendian history

Geological Society, London, Memoirs, 1997
It so happens that rocks of Vendian age are extensive and are well exposed in Svalbard. This applies especially to early Vendian, i.e. Varanger, with two distinctive glacial horizons as are treated in the Chapter 13. The Early Varanger (Smalfjord) episode can be correlated in most sections and so provides a reference horizon which serves approximately ...
W. Brian Harland, Nicholas J. Butterfield   +1 more
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Chapter 13 Vendian History

Geological Society, London, Memoirs, 1997
The Vendian Period, the latest Precambrian division, and the earliest division in which several Phanerozoic methods of correlation can be applied, is a convenient time division for Svalbard. It is separated from the earlier history in which correlation has uncertainties of tens of millions of years if not more.
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Vendian strata in their type area

Geological Magazine, 1987
AbstractIn the Eastern European region Vendian strata are divisible into two complexes: the lower one, only locally developed, is composed of alternating tillites, volcanics, sandy–clay rocks and dolomites; and the upper one, of alternating sandstone, siltstone, and mudstone strata with medusoid fauna, resting transgressively on the lower complex and ...
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New Vendian Metazoa with Colonial Organization

Paleontological Journal
A new organism with colonial organization, Olgunia bondarenkoae gen. et sp. nov., of sponge or coelenterate grade, is described from the Vendian deposits of the South-Eastern White Sea region. The new genus is characterized by a modular pattern and coordinated growth of neighboring individuals arranged in a fan-shape. The new genus has a combination of
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The Eocambrian (Vendian sensu stricto)

1983
Different geologic formations that originated after the Katangan orogeny are here attributed to the Eocambrian, the time of their formation being after 680–650 m.y. and prior to the beginning of the Cambrian period, that is earlier than 570 m.y. The duration of the Eocambrian is thus 100–80 m.y., which is much shorter than that of other principal units
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Discussion on was Scotland a Vendian RRR junction?

Journal of the Geological Society, 1995
B. J. Bluck, T. J. Dempster & G. Rogers write: In a recent Special paper, Soper (1994) contends that Dalradian deposition continued after the emplacement of the Ben Vuirich granite at 590 Ma (Rogers et al. 1989). The granite, however, contains metasedimentary xenoliths with an
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Feeding traces of proarticulata—the Vendian metazoa

Paleontological Journal, 2011
Three types of low-topography impressions are described from the Late Vendian, which are interpreted as the feeding traces of representatives of the phylum Proarticulata Fedonkin, 1985, which became extinct in the Precambrian. The producers of two types of trace were found.
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Vendian Faunas and the Early Evolution of Metazoa

1992
Until recently, paleontological data were almost completely ignored by zoologists studying the origin of major groups of invertebrates and the early phylogeny of the Metazoa, chiefly because Charles Lyell had long ago emphasized the incompleteness of the geological and paleontological record.
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