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      https://www.ias.ac.in/article/fulltext/jess/119/05/0701-0710

    • Keywords

       

      Tamra block, palynomorphs, Barren Measures Formation, Barakar Formation, Damodar Basin, Permian.

    • Abstract

       

      The Gondwana sediments comprising fine-grained shales,carbonaceous shales,sandstones and the coal horizon in borecore RT-4 (approximately 547.00 m thick)from Tamra block,Raniganj Coal field,Damodar Basin,are analyzed palynologically.Based on the distribution pattern of marker palynotaxa,two assemblage zones are identi fied.In the Barren Measures Formation,dominance of enveloping monosaccate (Densipollenites) along with striate bisaccate (Striatopodocarpites,Fauni- pollenites) pollen taxa,and the FAD ’s of Kamthisaccites and Arcuatipollenites observed at 30.75, have equated this strata (30.75 –227.80 m thick)with the Raniganj Formation of Late Permian in age.Downwards in the Barakar Formation,between 423.80 –577.70 m depths,an abundance of non-striate (Scheuringipollenites )and striate(Faunipollenites and Striatopodocarpites )bisaccate pollen taxa is observed,that dates late Early Permian in age.

      Fair occurrences of hyaline,distorted and blackish-brown plant matter is observed within 231.00 –408.40 m depths.Present study infers the existence of the Raniganj Formation in the lithologically delimited Barren Measures Formation in the study area,and the underlying unproductive strata (approx.177.40 m)might represent the part of the Barren Measures Formation.

    • Author Affiliations

       

      Srikanta Murthy1 B Chakraborti2 M D Roy2

      1. Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226 007, India.
      2. Coal Wing, Geological Survey of India, Kolkata 700 091, India.
    • Dates

       
  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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