1995-96 - Birbal Sahni Institute of Palaeobotany
1995-96 - Birbal Sahni Institute of Palaeobotany
1995-96 - Birbal Sahni Institute of Palaeobotany
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
BSIP<br />
Programme 4.3<br />
To carry out stable carbon isotope (C-13) and organic petrographic<br />
studies<br />
To attempt palaeoceanography<br />
modelling<br />
Based on the din<strong>of</strong>lagellate cyst evidence, lower part <strong>of</strong> the Trichinopoly Formation<br />
is dated to be Middle-Upper Turonian in age. A din<strong>of</strong>lagellate cyst biozonation scheme is<br />
proposed. Final plates and charts are prepared and a manuscript is finalised.<br />
Din<strong>of</strong>lagellate cyst, calcareous plankton (foraminifera, nann<strong>of</strong>ossils) and siliceous<br />
plankton (radiolaria) data through Albian-Santonian sequence <strong>of</strong> Cauvery Basin<br />
have been compiled to assess the sequence <strong>of</strong> bioevents having palaeoceanographic implications.<br />
Quantitative analysis <strong>of</strong> various din<strong>of</strong>lagellate cyst groups and palynodebris has<br />
revealed significant palaeoenvironmental signatures.<br />
Stratigraphic frequency distribution <strong>of</strong> Neocomian din<strong>of</strong>lagellate cysts recovered<br />
from subsurface sequence <strong>of</strong> Palar Basin is documented.<br />
K.P. Jain, Rahul Garg & Khowaja-Ateequzarnman<br />
Neogene calcareous nannoplankton palaeoceanography <strong>of</strong><br />
Andaman and Nicobar Islands<br />
Objective To compare Neogene calcareous nannoplankton assemblage<br />
<strong>of</strong> Andaman and Nicobar Islands with that known from nearshore<br />
and high latitude and to select cosmopolitan markers<br />
To integrate calcareous nannoplankton and planktonicforaminiferal<br />
zonations to improve dating resolution<br />
To record palaeoenvironmental events with special reFerence to<br />
Antarctica glaciation event based on plankton assemblage<br />
backed by stable isotope and organic data<br />
Based on data generated during previous years, fresh sampling was done in well<br />
measured sections <strong>of</strong> Car-Nicobar Island, with the aim <strong>of</strong> demarcating MiocenelPliocene<br />
boundary and selecting a suitable section in Sawai Bay area. Several low-latitude marker<br />
species <strong>of</strong> calcareous nann<strong>of</strong>ossils were found to be either missing or displayed diachronous<br />
appearance at MiocenelPliocene transition beds exposed in Sawai Bay region. In this<br />
aspect the vertical distribution <strong>of</strong> dark and birefringent horse-shoe shaped calcareous<br />
nann<strong>of</strong>ossils (ceratoliths) are significant for Indo-Pacific region, demanding more intensive<br />
study and photodocumentation <strong>of</strong> ta;<br />
A draft manuscript "NmUl<strong>of</strong>".·. 'IS from mud-volcanoes <strong>of</strong> Andaman<br />
: global biostratigraphic applicability" was prepared.<br />
Programme 4.4<br />
Objective<br />
Islands, India<br />
S.A. Jafar<br />
Late Cenozoic diatom biostratigraphy <strong>of</strong> Andaman and<br />
Nicobar Islands<br />
To study morphology and taxonomy <strong>of</strong> diatom and silic<strong>of</strong>lagellate<br />
taxa from Late Cenozoic surface and subsurface sections (type<br />
104
Change language