Late Proterozoic vase-shaped microfossils from the Visingsö Beds, Sweden
作者:
AndrewH. Knoll,
Gonzalo Vidal,
期刊:
Geologiska Föreningen i Stockholm Förhandlingar
(Taylor Available online 1980)
卷期:
Volume 102,
issue 3
页码: 207-211
ISSN:0016-786X
年代: 1980
DOI:10.1080/11035898009455157
出版商: Taylor & Francis Group
关键词: Microfossils;problematic fossils;Protista;phosphate nodules;Visingsö Beds;Upper Riphean;Lower Vendian;Proterozoic;Lundtorp;western Östergötland;southern Sweden;N5805 N5805 E1431 E1431
数据来源: Taylor
摘要:
Vase-shaped microfossils occur abundantly in phosphate nodules from near-shore, marine shales and siltstones of the Late Proterozoic (Late Riphean to Early Vendian) Visingsö Beds in southern Sweden. These fossils are not recovered in acid-resistant residues and are only detectable in thin-section. They are regarded as morphologically comparable to vase-shaped microfossils from Upper Proterozoic rocks of the Chuar Group in Arizona, Eleonore Bay Group in East Greenland, Jacadigo Group of Mato Grosso (Brazil), the Murdama Group of Saudi Arabia, and the Akademikerbreen and Roaldtoppen groups of Ny Friesland and Nordaustlandet (Svalbard). The microfossils are tentatively interpreted as remains of loricate, heterotrophic protists which functioned as predators in the near-shore planktic ecosystem, feeding upon bacteria, algae, and other protists. From available data it is concluded that these microfossils may be biostratigraphically significant as indicators of the uppermost Proterozoic (Upper Riphean and Lower Vendian).
点击下载:
PDF (868KB)
返 回