1994-95 - Birbal Sahni Institute of Palaeobotany

1994-95
To study morphotaxonomy
of the palynofossils
zonation in the emire Barail sedi­
To establish palynological
mentary succession
To study the botanical affinity of the various spore-pollen
Out of seventy-five samples collected from Oilli River section, 21 samples yielded
spores and pollen. The assemblage shows the dominance ofpteridophytic spores, viz., Striatriletes,
Lygodiumsporites, Dictyophyllidites, Crassoretitriletes, Polypodiaceaesporites and
Polypodiisporites. The angiospermie pollen are common and are represented by
Bombacacidites, Palaeomalvaceaepollis and Pellicieroipollis. Some Permian striate bisaccate
pollen, mostly represented by Striatites, Lahirites and Striatopodocarpites are also encountered
in the assemblage.
taxa
B.D. Mandaokar
Programme 6.8
Objective
Palynostratigraphy of the KopiJi Formation of Khasi and
Jaintia Hills, Meghalaya
To establish palynological zones for correlation and dating
To deduce palaeoclimate and depositional environment
To carry Ollt SEM studies of important palynofossils
evolutionary trends
to trace
Forty-six samples of Kopili Formation fTOm.Iowai-Badarpur Road Section were
macerated. In the assemblage, the pteridophytic spores are represented by Polypodiisporites,
Monolites, Polypodiaceaesporites, Striatriletes, Lygodillmsporites and Cyathidites; the
angiospermic pollen are represented by Densiverrupollenites. Fungal forms are represented
by Dyadosporonites, Phragmothyrites, Notothyrites, etc. The study is continued.
G. K. Tri vedi
Programme 6.10 Biodiagenesis of Tertiary coals from Nagaland and kerogen
study from Tertiary sequence of Assam-Arakan Basin
Objective To evaluate Tertiary coals from Nagaland and kerogen study
from Tertiary sequence of Assam-Arakan Basin
A set of nine coal samples with Ro max. 0.55 to 0.81 per cent has been selected for
assessing alteration effect of fluorescence on their perhydrous (nuorescing) vitJ'inite from
49 samples of Garo and .Iaintia Hills of Meghalaya. Fluorescence alteration behaviour of
perhydrous vitrinite in these Palaeocene "abnormal" coals shows that t11eirrank is related to
the contents of primary and secondary bitumen. Relatively early generation of secondary
bitumen in these coals than in normal humic coals is colTelatable with their coking property
as well as abnormal renectance behaviour.
III