AR 1978-79.pdf - Birbal Sahni Institute of Palaeobotany
AR 1978-79.pdf - Birbal Sahni Institute of Palaeobotany
AR 1978-79.pdf - Birbal Sahni Institute of Palaeobotany
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RESE<strong>AR</strong>CH<br />
I. PRE-CAMBRIAN<br />
1.1. Studies have been carried out on different rock<br />
group~ measuring more than about 600 million years in<br />
age, in order to find out the earliest forms <strong>of</strong> life, both plant<br />
and animal, that existed in our planet. For this purpose<br />
the following strata were ana lysed :<br />
1. Iron ore series at Kasia near BarbiJ, Orissa.<br />
2. Vintlhyan Supergroup from (i) Rewa-Shikarganj area,<br />
(ii) Suker-shales, (iii) Sapotra-Karauli Sections, Rajasthan.<br />
3. Cuddapah Supergroup from Varikunta area, Karnataka.<br />
4. Ganga Valley samples from Ujhani and Kasganj, Uttar<br />
Pradesh<br />
5. Penganga beds near Ghugus, Maharashtra.<br />
6. Jutogh Group<br />
7. Samples from Z"ire (Central Africa).<br />
All these rocks have yielded interesting, simple forms.<br />
The finds from the Vindhyan Supergroup are specially nole·<br />
worthy. Besides colonial or single-celled spherical micro·<br />
biota, the stromatolite Conophyton cylindricus has also been<br />
identified. Specimens <strong>of</strong> jelly fish and sponge-hke objects<br />
have also been found. The disc-like remains referred to<br />
Fermoria and Tasmanitts have been studied critically.<br />
Samples <strong>of</strong> Suket shale were macerated to prepare about<br />
100 single mount specimens for study by modern techniques