AR 1978-79.pdf - Birbal Sahni Institute of Palaeobotany
AR 1978-79.pdf - Birbal Sahni Institute of Palaeobotany
AR 1978-79.pdf - Birbal Sahni Institute of Palaeobotany
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4<br />
Glossopteris leaves alongwith the occurrence <strong>of</strong> Schizoneura<br />
gondwanensis, Trizyzia speeiosGJ Stellatheea robusta and other<br />
Lower Gondwana ferns. The miospore assemblages show<br />
a dominance <strong>of</strong> striate·disaccate forms alongwith Scheuringi~<br />
pollellites, Demipolllnites and other trilete forms. These<br />
assemblages suggest an Upper Raniganj age for this bed.<br />
2.4. Fossil wood from Raniganj Coalfield, West Bengal<br />
One fossil wood has been identified as a new genus<br />
J>alaeospirox'ylon.<br />
2.5. Sporae dispersae and palynostratigraphy<br />
2.5.1. Palynostratigraphy <strong>of</strong> Lower GondWalZG Formation,<br />
Hular Coalfield<br />
The palynostratigraphy <strong>of</strong> the Hutar Coalfield has been<br />
completed and the results <strong>of</strong> this study have been incorporated<br />
in a Ph.D. Thesis. The highlights <strong>of</strong> the work are:<br />
(i) Demarcation <strong>of</strong> Karharbari Formation in the Hutar<br />
Coalfield on the basis <strong>of</strong> lithological and palynostratigraphical<br />
evidences;<br />
(ii) Indication <strong>of</strong> the possibility <strong>of</strong> the Barren Measure<br />
Formation in this coalfield on the palynological evidences;<br />
(iii) Recognition <strong>of</strong> 6 biozones in the Lower Gondwana<br />
Formation <strong>of</strong>Hutar Coalfield, viz.,<br />
Zone- VI Barren Zone<br />
Zone- V Densipolleniles-Scheuringipollenites Faunipolleniles<br />
Assemblage zone (Upper Barakar).<br />
Zone-IV Scheuringipol/rniles-Slriasulciles Assemblage<br />
zone (Barakar).