1995-96 - Birbal Sahni Institute of Palaeobotany

1995-96
Pradesh and their distribution patterns in coal-bearing strata were analysed. The
palynoassociation rich in angiospermic pollen was assigned to 23 genera and 25 species.
Pteridophytes are represented by 16 genera and 25 species. Fungal remains comprise 6
gencra and 6 species. Gymnospermic palynofossils are strikingly absent. Quantitatively,
palynofossils of the Coal seam I are comparable with that of coal seam 11.Based on palYJlological
data the sediments are assigned to Oligocene age. Retitrescolpites, Polyadopollenites,
Bomhacacidites, Meyeripollis, Pteridacidites and Osmundacidites indicate the existence of
a humid tropical to subtropical climate with high rainfall.
B.D. Mandaokar
Programme 6.8 Palynostratigraphy of the Kopili Formation of Khasi and
Jaintia Hills, Meghalaya
Ohjective To estahlish palynological zones for correlation and dating
To deduce palaeoclimate and depositional environment
to trace evo­
To carry out SEM studies of important palynofossils
lutionary trends
Macerated 35 samples of Kopili Formation from Umrangso section, North Cachar
Hills, Assam. The productive samples yielded poor palynofossils; only a few sporadic
pteridophytic spores Striatriletes. Cyathidites and Monolites could be encountered.
A manuscript on "Late Eocene palynoflora of Kopili Formation from Jowai-Badarpur
Road, Meghalaya : palaeoecologic and palaeogeographic interpretations" was finalized.
G.K. Trivedi
Programme 6, I0 Biodiagenesis of Tertiary coals from Nagaland and kerogen
study from Tertiary Sequence of Assam-Arakan Basin
Ohjective
To evaluate Tertiary coals from Nagaland and kerogen study
Fom Tertiary sequence of Assam Arakan Basin
Twenty five coal and non-coal samples from four coal seams of Changki Valley
Coalfield, Nagaland were quantitatively analysed for their maceral contents under normal
incident mode. The coals are rich in vitrinite, contain subordinate amount of liptinite,
whereas inertinite macerals are low to moderate in proportion. Mineral matter in them is
represented mainly by pyrite, clay and calcite. Petrographically, they are similar to those of
other Oligocene coals from coalfields of Assam.
A paper entitled "Fluorescence alteration behaviour of vitrinite in some Late
Palaeocene bituminous coals from Garo and Jaintia Hiils of Meghalaya, India" was finalized
and got.it reviewed by Mr. Karl Ottenjann, GLA, Krefeld. Finalized another paper on
"Fluorescence alteration behaviour of perhydrous vitrinite and spectral fluorescence analysis
of sporinite and alginite macerals in some Late Palaeocene coals from Meghalaya, India".
B.K. Misra
Programme 6,11 :
Palynostratigraphy
Meghalaya
and co•.•.e1ation of Tertiary sediments of
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