Results 171 to 180 of about 3,951 (214)
Some of the next articles are maybe not open access.
Vendian strata in their type area
Geological Magazine, 1987AbstractIn 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 ...
openaire +1 more source
New Vendian Metazoa with Colonial Organization
Paleontological JournalA 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
openaire +1 more source
The Eocambrian (Vendian sensu stricto)
1983Different 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
openaire +1 more source
Discussion on was Scotland a Vendian RRR junction?
Journal of the Geological Society, 1995B. 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
openaire +1 more source
Feeding traces of proarticulata—the Vendian metazoa
Paleontological Journal, 2011Three 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.
openaire +1 more source
Vendian Faunas and the Early Evolution of Metazoa
1992Until 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.
openaire +1 more source