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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

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