Associations of mio and megafloras in the roof shales of some Barakar coal seams, South Karanpura coalfield, Bihar

K.M. Lele; Shaila Chandra

doi:10.54991/jop.1975.990

Authors

K.M. Lele Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India
Shaila Chandra Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1975.990

Abstract

Miofloral assemblages recovered from the roof shales of the Argada Seam, Lower Nakari Seam, Upper Nakari Seam and Kurse Seam are recorded under 40 spore-pollen genera and 51 species. Scheuringipollenites, Striatopiceites and Strotersporites are characteristically dominant.

By comparison with the Barakar palynozones of the type area, the Argada mioflora approaches the ‘Nonstriate-disaccate zone’ characterized by Scheuringipollenites. The younger roof shales of the Nakari-Kurse Group have miofloras referable to the “Striate-disaccate zone” characterized by Striatopiceites and Strotersporites. The 4 roof shale miofloras seem to fall within the Middle to Upper Barakar interval which is in agreement with their geological position. Certain peculiarities between the shale and coal miofloras are given in view of their probable bearing on facies differences.

The South Karanpura material provides an interesting situation where mio- and megafloral counterparts are found in fair abundance. Both evidences support the distinction of the Argada roof shale from the younger shales of the Nakari Kurse Group. However, within the latter group, the megafloral composition of individual roof shales is apparently more critical than that of the miofloras. A wide study of mio- and megafloral associations and the factors fafluencing their distribution is needed to resolve these problems.

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