1996-97 - Birbal Sahni Institute of Palaeobotany

1996-97
leaves, seeds, sporangia together with tracheids, etc., suggests origin of coal under hypoautochthonous
condition, also supported by the typical structured inertinites. Fluorinite
associated with cuticle, spores and other liptinite group of macerals at different time level
indicates the presence of shallow niches over the deposited peat surface.
The Oligocene to Lower Miocene (surface samples) and palynoflora from Tertiary
sediments of Kundra, Quilon and Warkalli and Eocene to Miocene (subsurface samples)
Quilon, Kerala have shown several ecological communities. Out of these, the back mangrove
floral community along with dinoflagellate cysts is important.
On the basis of calcareous nannofossils Miocene/Pliocene Boundary could be
established in Sawai Bay Section of Car Nicobar Island based on LAD of Discoaster
quillqueramus, Triquetrorhabdulus rugasus and FAD of Ceratalilhus acullls.
The Palaeocene dinocyst taxa are recorded for the first time from the Subathu samples
of Kalakot area, Beragua Formation. The palynoassemblage suggests that the basin was
very shallow and the sediments were deposited in marine condition.
The palynological studies of the sediments exposed along Tura-Dalu Road Section
in West Garo Hills have been carried out. The palaeoclimate during Palaeocene-Eocene
(Tura Formation) is indicated to be tropical to subtropical climate sustaining wet evergreen
forest in the vicinity of the area. The presence of dinoflagellate cysts suggests a shallow
marine condition during the deposition. The palaeoclimate during Oligocene (Kherapara
Dr S.c. Rai. Mayor. Lucknow, opening the "Plant Fossils Gallery".
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