1995-96 - Birbal Sahni Institute of Palaeobotany
1995-96 - Birbal Sahni Institute of Palaeobotany
1995-96 - Birbal Sahni Institute of Palaeobotany
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BSIP<br />
genus<br />
Callialmporiles.<br />
Vijaya<br />
Pmgramme 2.17<br />
Evolutionary diversification <strong>of</strong> Cretaceous flora <strong>of</strong> Pranhita<br />
Godavari Graben<br />
Objective<br />
Programme 2.18<br />
Objective<br />
To systematically study morphology anatomy, ecology and<br />
related aspects <strong>of</strong> megafossils<br />
To detail out floristic diversification and observe evolutionary<br />
inter-relationships<br />
Taphonomic and cladistic analysis<br />
Fossil floral assemblage <strong>of</strong> Ganga pur Formation has been studied. Two distinct<br />
fossil leaf assemblages were recognised. Taxa like Equisefites, Gleichenia. Acfinopteris,<br />
Rhizomopteris, Ptilophyllum, Pterophylll/m, Satpl/ria, Aral/caria, Brachyphyllum,<br />
Pagiophylll/m and Elatocladus characterise the Gangapur flora. Close affmity with<br />
Sehora flora <strong>of</strong> Satpura Basin is suggested. Comparative studies with other co-equivalent<br />
East Coast sediments exemplifY differential preservation and occurrence <strong>of</strong> restricted niches.<br />
Plant megafossils from shales/sandstones exposed on surface around Asifabad<br />
area, particularly 15 km north-west and 20 km south-east, in Godavari Graben, wcre<br />
collected. The assemblage included impressions and compressions <strong>of</strong> Podocarpaceae,<br />
Araucariaceae, Taxaceae and Bennettitales. The contact <strong>of</strong> Gondwanas and Deccan Traps<br />
was traced and lithological succession was constructed. Mostly gymnospermous leaf<br />
fossils were observed. Samples for palynological studies were also collected from the<br />
sections.<br />
East Coast sedimentary basins in Krislma-Godavari, Palar and Cauvery basins<br />
were also visited for comparative studies.<br />
A. Rajanikanth<br />
Petrographic evaluation <strong>of</strong> coals from Ramkola Tatapani<br />
Coalfield, Madhya Pradesh<br />
To study microconstitl/entsjor the assessment <strong>of</strong> coal characteristics<br />
Megascopic characteristics <strong>of</strong> coals collected from bore-holes TRS- I5, TRS-16<br />
and TRM-3 and outcrop sections were studied in detail. Photographs <strong>of</strong> various lithotypes<br />
having variable thickness were taken. The pyrite infillings, crack patterns in vitrain, lustre,<br />
etc. <strong>of</strong> lithotype bands were studied.<br />
[n all, 95 samplcs (91 from bore-holes and 4 from outcrops) were crushed and<br />
sieved and particulate pellets were prepared. Reflectance measurements on maceral vitrinite<br />
were made on 81 samples for rank determination <strong>of</strong> coals. The maximum reflectance (in<br />
oil) <strong>of</strong> the coals ranges from 0.50 to 0.67%, which indicates that these coals have attained<br />
high volatile bituminous C stage.<br />
Anand-Prakash & Shinjini Sar~U1a
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