Latest Proterozoic Microfossils from the Nama Group, Namibia (South West Africa)

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Latest Proterozoic Microfossils from the Nama Group, Namibia (South West Africa)

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Title: Latest Proterozoic Microfossils from the Nama Group, Namibia (South West Africa)
Author: Knoll, Andrew; Germs, Gerard J. B.; Vidal, Gonzalo

Note: Order does not necessarily reflect citation order of authors.

Citation: Germs, Gerard J. B., Andrew H. Knoll, and Gonzalo Vidal. 1986. Latest Proterozoic microfossils from the Nama Group, Namibia (South West Africa). Precambrian Research 32(1): 45-62.
Access Status: At the direction of the depositing author this work is not currently accessible through DASH.
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Abstract: Gray to black shales from the Kuibis and Schwarzrand subgroups of the Nama Group, South West Africa/Namibia, contain a distinctive, if depauperate, assemblage of organic-walled microfossils. The assemblage is dominated by leiosphaerid acritarchs and fragments of the ribbon-like macrofossil Vendotaenia. Small unicells and non-septate filaments interpreted as the sheaths of oscillatorian cyanobacteria occur with variable frequency throughout the subgroups, while Chuaria circularis, Bavlinella faveolata, and a Comasphaeridium-like form (known from a single specimen) are found as rarer components of the biota. Assemblage composition shows no strong stratigraphic trends within the subgroups. The Nama assemblage compares closely with biotas previously described from upper-most Proterozoic (Valdaian) sequences of the Baltic region, Scandinavia, and Australia, and confirms a latest Proterozoic age for the Kuibis and Schwarzrand subgroups and their contained metazoan fossils. Although its significance is unclear, Nama microfossils tend to be strongly corroded. This diagenetic feature is widespread among Valdaian assemblages, but appears to be much less characteristic of older or younger biotas.
Published Version: http://dx.doi.org/10.1016/0301-9268(86)90029-X
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:3009566

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  • FAS Scholarly Articles [7495]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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