1996-97 - Birbal Sahni Institute of Palaeobotany

BSIP
Collaborative
ProjectslWork
PROJECT
I
P. K. Maithy & R. Babu
PRECAMBRIAN-CAMBRIAN BOUNDARY EVENTS
(IGCP PROJECT - 303)
Noteworthy organic-walled microfossil assemblage from the Shale Member of
Upper Tal Formation, Mussoorie Syncline, Lesser Himalaya, Uttar Pradesh has been
reported. The Shale Member of the Upper Tal Formation is well knowr. for its
palaeontological remains and trilobite, viz., Redlichia noetilingi and brachiopods­
Magnicanalis, Walcot/ina, Lingulella, Obolus and Obo/ella. On the basis of the reported
assemblage of animal remains the age of the beds has been derived to be Botomian
stage of the Early Cambrian. The beds containing those animal fossils are exposed at:
(a) about 1.5 km frcm Dhaulagiri, towards Maldeota along Maldeota - Surkhet
- Gopi Chand Ka Mahal Section, Mussoorie Syncline;
(b) at 8 km stone before Mussoorie near Jabarkhet Toll Barrier along Mussoorie
- Dhanaulti section.
The rock samples comprise greyish - black shale interbedded with quartzite.
The black shales in petrographic thin section show preservation of rich and diversified
organic - walled microfossils previously unreported from this bed. The recorded organic
walled microfossils belong to acritarch, viz., Sphaeromorphitae (Monosphaerite ­
Favososphaeridium, Stictosphaeridium and Nucellosphaeridium); Polyspherite
(Symp/assosphaeridi um), Prismatomorphite (Octaedryxium), Polygonomorphite
(Anguloplanina) and Versimorphite (Pu/vinomorpha). The macerated residue comprises
Obruchevella, Sphaerocongregus and Micrhystridium. The assemblage shows
continuation of PCtC marker .forms.
PROJECT
III
PALYNOLOGICAL STUDIES OF FLYSCHOID SEDI­
MENTS FROM ANDAMAN-NICOBAR BASIN, INDIA
S.A. Jafar, A. Tripathi, J.P. Mandai & B.K, Misra
Ten flyschoid shale samples of Baratang Island were analysed by normal
maceration and by microwave digestive system.
PROJECT IV PALYNOSTRATIGRAPHY AND PALYNOFACIES OF
TERTIARY SEDIMENTS OF NORTH-EAST INDIA
Madhav Kumar [& S.K. Dutta (Dibrugarh)]
S8