The Middle to Late Proterozoic Vindhyan Supergroup covers an area of
Abundant coccoid and filamentous microfosslls are found in petrographic thin sections of stratiform stromatolitic cherts from the z1200 Ma-old Fawn Limestone of the Khein-jua Formation, lower Vindhyan Supergroup, central India. The assemblages is dominated by coccoid forms of probable chroococcacean...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1982
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.594.5553 http://www.geol.ucsb.edu/faculty/awramik/pubs/MCME8347.pdf |
| Summary: | Abundant coccoid and filamentous microfosslls are found in petrographic thin sections of stratiform stromatolitic cherts from the z1200 Ma-old Fawn Limestone of the Khein-jua Formation, lower Vindhyan Supergroup, central India. The assemblages is dominated by coccoid forms of probable chroococcacean and entophysalidacean affinities; most filaments closely resemble the osciliatoriacean Gunflintia minuta. Unlike other Middle to Late Proterozoic stromatolitic microbiotas, the Kheinjua is dominated by microfossils < 10,m in diameter. Another notable feature of the assem-blage is that its microfossiis are found in extensive sheets of amorphous organic matrix, which also contains rare bizarre morphs unique to this formation. Taxonomically, the Kheinjua microbiota most closely resembles Proterozoic micro-biotas described from the Belcher Islands (Kasegalik Formation), McArthur Group, Bitter Springs Formation, and the Yudoma Suite. The following taxa are formally described: Chroococcaceae- Myxococcoides minor |
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