1995-96 - Birbal Sahni Institute of Palaeobotany

1995-96
eocomian age has becn suggested.
Preliminary study of Balidih assemblage is in progress and efforts arc bcing made
to get cuticle for exact identification of Thinnfeldia like fronds present in the assemblage.
Section culling of Sonajori chert blocks and their examination is in progress.
Jayasri Banerji
The megafossils collected from Dhokuti locality were sorted out for studies. This
tossil assemblage shows the presence of genera like Marratiop.vis, Todites, Cladophlehis,
Sphenoptel'ls, l'tilophyl/llm, l'terophyl/llm, etc.
Jayasri Banerji & B. . Jana
Morphotaxonomy, photodocumentation and identification of plant megafossils
of Sitalpur locality have been carried oul. Recorded megafossils are Cladophlehis,
I'tilophyllllln clltchense, P aClltifolillm, Elatocladlls sp., Brachyphyl/llm sp. and Arallcarites.
The floral assemblage on the whole is dominated by cycadophytes and conifers.
Neeru Prakash
Programme 2.8
Ohjcctive
Palynological diversity and palaeoclimate through
Gondwana Sequence in Rajmahal Ba"in
To stlldy selected horizons, mainly fimn hore-cores to{iIIthe
existing lacllnae in the data for hllilding a complete sequence
To tag resllits with other data, sllch 0.\' megafloral andsedimentolugical
in/brmation and geological set-lip
To determine age and palaeoclimatic condition as depicted hy
spore and pollen pal/ems
11,e ptcridophytic sporc populations rccorded in the lntertrappean beds were analysed.
The spores pertaining to tree fems Cyathiaceae. Dicksoniaceae. Osmundaceae and the
non-arboreal rhizomatous fem Gleieheniaceae and Sehizaeaceae, etc. are represented in the
population. The diversity of spores shows increase in tenns of qualitative richness progres­
Sl\'e!) \\ ith them. The volcanic activity probably has provided beller substrate and
climate for the growth ofpteridoph)1es. On the basis of representation offern families in the
palynological data a subtropical to temperate climate has been interpreted.
From the Late Permian sediments of Rajmahal Basin characteristic pollen having
angiospcflllOid pollen exine characters having infrabaculate exine stmcturc with two sulcus
on each face of the bod) arc recorded. These fon115are described under new taxon
Danlln/tes gen. novoMaceration of samples from bore-hole RCH-15 I was done for recovery
of pah nomorphs.
Samples from three bore-holes were collected for dating of DubraJpur sedIments
and the underlying coal horizon. The ~ pc section for Dubrajpur Formation in Sam'an
Pahar \\as tral'ersed for argillaceous sediments. The oolitic bed could be ooserl'ed after
the second brak in slope. It is a marker horizon and is significant for tlie firstlntertrappean.
A sUITey of the area near Kharikharal Village was made to assess feasibility for collection