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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Asia
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Indian Peninsula
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India
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Rajasthan India
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Udaipur India (1)
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fossils
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bacteria (1)
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microfossils (1)
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geologic age
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Precambrian
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upper Precambrian
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Proterozoic
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Paleoproterozoic (1)
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minerals
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oxides
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iron oxides (1)
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phosphates
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apatite (1)
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Primary terms
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Asia
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Indian Peninsula
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India
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Rajasthan India
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Udaipur India (1)
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atmosphere (1)
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bacteria (1)
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Precambrian
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upper Precambrian
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Proterozoic
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Paleoproterozoic (1)
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sedimentary rocks
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chemically precipitated rocks
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phosphate rocks (1)
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sedimentary structures
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biogenic structures
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stromatolites (1)
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sedimentary rocks
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sedimentary rocks
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chemically precipitated rocks
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phosphate rocks (1)
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sedimentary structures
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sedimentary structures
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biogenic structures
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stromatolites (1)
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High primary productivity in an Ediacaran shallow marine basin influenced by strong seasonal to perennial upwelling
A template for an improved rock-based subdivision of the pre-Cryogenian timescale
Fossil evidence of iron-oxidizing chemolithotrophy linked to phosphogenesis in the wake of the Great Oxidation Event
Megascopic carbonaceous compression fossils from the Neoproterozoic Bhima Basin, Karnataka, South India
Abstract An abundant well-preserved assemblage of annulated carbonaceous compressions and impressions has been recorded from the intra-cratonic argillaceous sedimentary sequence of the Bhima basin in south India. Impressions and carbonaceous compressions recorded in the Hulkal Formation belong to annulated forms similar to the previously reported Sinosabellidites huainanensis , Protoarenicola baiguashanensis and Pararenicola huaiyuanensis from China. This paper discusses the diversity, systematics, affinity, biostratigraphical potential and global significance of these remains. The previously proposed worm-like body fossil affinity for these organisms, based on similarity with the Chinese assemblage, has been reinterpreted as with pre-Ediacaran epibenthic organisms. Fresh investigations of the Indian assemblage of such specimens reveal their close proximity to the algal affinity. The occurrence of global marker events, such as phosphatization, the presence of complicated annulated carbonaceous remains in the Hulkal Formation and the absence of stromatolites in the carbonate sequences of the Bhima basin, collectively indicate a Neoproterozoic, possibly pre-Sturtian age for the Bhima Group.