1994-95 - Birbal Sahni Institute of Palaeobotany
1994-95 - Birbal Sahni Institute of Palaeobotany
1994-95 - Birbal Sahni Institute of Palaeobotany
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BSIP<br />
onc shows paired remains while the othcr rentling one. Thc first may bc the tracks <strong>of</strong><br />
arthropod movement and the second <strong>of</strong> an annelid.<br />
Study <strong>of</strong> macr<strong>of</strong>ossils referable to problematic algac collected from the argillaceous<br />
sediments <strong>of</strong> Rohtas FOimation exposed at Murlipahar and Amjhore, Rohtas District,<br />
Bihar was completed. The algal forms arc distincUy segmentcd bearing laterally spheroidal<br />
structures or ?fluiting bodies. Morpbologically it appears to be nearer to Pbaeophyceae<br />
forms or Ectocarpales.<br />
P.K. Mailhy<br />
& Rupendra Babu<br />
Prngramme 1,2<br />
Objective<br />
Palaeobiology <strong>of</strong>the·Proternzoic sediments in Cuddapah,<br />
Kaladgi and Ilhima basins<br />
To record distribution <strong>of</strong> Precambrian micr<strong>of</strong>ossils in Proterozoic<br />
succession <strong>of</strong> Cuddapah, Kaladgi and !Jhima basins<br />
Diversified<br />
organic rcmains have been recorded from the Halkal Shale Formation,<br />
Bhima Basin. The megascopic circular, elongated, linear and curved carbonaceous compressions<br />
and impressions have been recorded on the bedding surrace <strong>of</strong> shales from Kolkur,<br />
GundgUrlhi and Chcnnur villages. Somc or the forms compare with Chuaria. !Jeltinia and<br />
Ovidscina. The arlinities or linear forms is being examined. TI1C scction measuremcnt has<br />
been done at these localities to char1thc precise vertical distribution <strong>of</strong> the car'bonised Iilms.<br />
TIlese rorms show gigantism at cel1ain levels.<br />
The rock samples from Sahabad Limestone Formation and Rabanpalli Sandstone<br />
Formalion show poorly preserved movemcnt traces. Detailed study <strong>of</strong> thesc traccs was<br />
conlinuedto understand Uleir aflinity ami stratigraphic importance, if any.<br />
Acid<br />
resistant organic rcmains recovered through maceration <strong>of</strong> shales from Kolkur<br />
Village show the presence <strong>of</strong> smooth-walled acritar'chs, liIamentous algal sheaths and coccoid<br />
algae. Presenec or mineralised shell picees has also heen recorded in bulk maceralion<br />
using hydr<strong>of</strong>luoric acid. The affinities <strong>of</strong> these shells ar'e being workcd out.<br />
Manoj Shukla & Mukund Shar'ma<br />
Prngramme 1.3 Calcareous skeletal algae from Indian Phanerozoic sediments<br />
Objective To study the morphology <strong>of</strong> skeletal alxae and their significance<br />
in biostratigraphy<br />
A surveyor literature was made concerning the previous work done in calcareous<br />
algae rrom the Phanerozoic sediments <strong>of</strong> India.<br />
Thin seclions <strong>of</strong> calcar'eous limestones were made and 150 slides werc prepared<br />
rrom the previously collected samples from the Cretaceous <strong>of</strong> l3agh Group, Dhar' District,<br />
Madhya Pradesh and Niniyur Group <strong>of</strong>lilUeltirapalii District, Tamil Nadu. Study or calcar'-<br />
711
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