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Rajhara borehole, Daltongunj coalfield (Permian of Indian Ocean)

Where: Indian Ocean (24.2° N, 84.0° E: paleocoordinates 67.9° S, 62.3° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Talchir Formation, Asselian (298.9 - 295.0 Ma)

• 35 m below the base of the Karharbari coal measures, and underlies the lower Sakmarian marine horizon

• bed-level stratigraphic resolution

Environment/lithology: paralic; lithified shale

• The vertical organisation of lithofacies indicates a progressive change of depositional environment, accompanied by a gradual amelioration of climate from periglacial at the base to a restricted lacustrine environment culminating in a transgression of the sea towards the end of Talchir deposition. Position between plant-bearing sandstone and marine marl suggests paralic environment.
• Shaly parting near the top of a gray colored shale-siltstone rhythmite

Size class: macrofossils

Preservation: mold/impression

Collection methods: core

• Repository: Geological Survey of India

Primary reference: A. B. Dutt. 1977. Rajharablatta laskarii, a new lower Gondwana fossil insect from Daltongunj coalfield, Bihar. Records of the Geological Survey of India 108:167-169 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 166862: authorized by Matthew Clapham, entered by Matthew Clapham on 02.03.2015

Creative Commons license: CC BY (attribution)