1994-95 - Birbal Sahni Institute of Palaeobotany
1994-95 - Birbal Sahni Institute of Palaeobotany
1994-95 - Birbal Sahni Institute of Palaeobotany
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<strong>1994</strong>-<strong>95</strong><br />
and Retidiporocolpites possessing different morphological characters, but all having a characteristic<br />
type <strong>of</strong> aperture called "Diporocolpis", were described from the bore-hole KI2,<br />
drilled by MECL at Kuchaur-Benia area, Bikaner District. The "Diporocolpis" is proposed<br />
as a new type <strong>of</strong> aperture wlllch is characterized by the presence <strong>of</strong> two equatorial pores<br />
connected by a colpus. In some genera, the margin <strong>of</strong> aperture is spinose willIe in others it<br />
is psilate. The exine is variously sculptured or structured.<br />
Besides, hexacolpate pollen closely resembling the extant pollen <strong>of</strong> Ocimum were<br />
also recovered from the same bore-hole. The palynological assemblage indicates an Early<br />
Eocene age. Since this is the oldest record <strong>of</strong> fossil Ocimum pollen known so far, it is<br />
postulated that the genus Ocimum originated in India. The veneration and sanctity that<br />
Ocimum generates in the minds <strong>of</strong> people <strong>of</strong> India reflects its antiquity in India as demonstrated<br />
in this finding.<br />
Some new spore pollen genera, e.g., Paclzymonoletasporites,<br />
and Retitetradites are also proposed from the same bore-hole.<br />
PluricolumeUatepollis<br />
R.K<br />
Kar<br />
PROJECT 4<br />
Programme 4.1<br />
Objective<br />
PHYTOPLANKTON BIOSTRATIGRAPHY OF MARINE<br />
SEDIMENTARIES OF INDlA<br />
Phytoplankton biostratigraphy <strong>of</strong> Cretaceous - Palaeogene<br />
sequences <strong>of</strong> South Shillong Plateau, Meghalaya with<br />
emphasis on time boundaries and palaeoceanography<br />
To document lithological succession and facies variations in<br />
outcrop areas<br />
To study dinocyst morphology and biostratigraphy and to document<br />
phytoplankton rich levels<br />
To integrate dinocyst, calcareous plankton and<br />
palaeontological data for stratigraphic precision<br />
To carry oUIpalyn<strong>of</strong>acies and organic petrographic studies<br />
To carry out oxygen isotope and geochemical<br />
KIT boundary<br />
To allempt palaeoceanographic<br />
interpretations<br />
studies across<br />
Photodocumentation, morphologic study and identification <strong>of</strong> Danian din<strong>of</strong>lagellate<br />
cyst taxa have been calTied out. Photodocumentation and identification <strong>of</strong> Late<br />
Palaeocene din<strong>of</strong>lagellate cyst assemblage from Cherrapunji area were also completed.<br />
KP. Jain, Rahul Garg & Khowaja- Ateequzzaman<br />
A draft on "Integrative bioevents at KIT boundary in Meghalaya" has been prepared.<br />
Rahul Garg & KP . .lain<br />
99
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