Results 161 to 170 of about 1,084 (191)

Paleoecological feedback and the Vendian-Cambrian transition

Trends in Ecology & Evolution, 1988
The emergence of abundant skeletonized animals during the Vendian-Cambrian transition is seen by paleontologists as an 'explosion' when nearly all basic designs of invertebrate life appeared for the first time in the fossil record. Breakthroughs in trophic strategy, involving an increasing three-dimensionality in the benthic habitat and positive ...
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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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Metameric features in the Vendian metazoans

Italian Journal of Zoology, 1998
Abstract Metamerism as the serial homology is widespread among the Vendian (Late Precambrian) metazoans. Prevalence of segmented forms among the Vendian Bilateria suggests that in many phylogenetic lineages of Metazoa the evolutionary development of the bilateral symmetry and metamerism were related processes.
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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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Late Vendian postcollisional leucogranites of Yenisei Ridge

Doklady Earth Sciences, 2017
The Late Vendian (540–550 Ma) U–Pb zircon age of postcollisional granitoids in the Osinovka Massif was obtained for the first time. The Osinovka Massif is located in rocks of the island-arc complex of the Isakovka Terrane, in the northwestern part of the Sayany–Yenisei accretion belt. These events stand for the final stage of the Neoproterozoic history
A. D. Nozhkin, I. I. Likhanov, V. V. Reverdatto, T. B. Bayanova, S. V. Zinoviev, P. S. Kozlov, N. V. Popov, N. V. Dmitrieva   +7 more
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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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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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Colonization of substrates: Vendian sedentary benthos

Paleontological Journal, 2010
Studies of fossils sampled from a single fossiliferous layer (monotopic series) and a summary of previous data on taphonomy and morphology of Vendian macroorganisms suggest that most strategies of attachment of sedentary benthos were formed in the Vendian. These included: (1) free living with possible organic gluing; (2) fixation on the substrate using
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New reconstruction of Kimberella, problematic Vendian metazoan

Paleontological Journal, 2009
Six groups of fossil remains of Kimberella quadrata are described. They represent the imprints of the body in different types of preservation (including the group of specimens that are elongated more than twice in comparison with the common ones) and also the feeding traces and mucus secretions. The imprint is considered to be created only by the upper
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