Abstract:
Rumli area lies in the foothills of Islamabad, the capital territory of Pakistan. This area is
traversed by a major thrust fault, the Main Boundary Thrust, whose eastern and western
continuation is traceable in Indian occupied Kashmir, the disputed territory and Afghanistan
respectively. The study area hosts Paleogenerocks namelyHangu, Lockhart, Patala formations,
Margala Hill Limestone, Chorgali and Khuldana formations. The Margala Hill Limestone and
Chorgali Formation, which are carbonates of Eocene age and deposited in Hazara basin, were
studied for the identification of microfossils and their depositional environments.Bio traces,
depth ranges of fossils on slope and lithology on slope level of deposition were taken as tool to
correlate the Paleogene rocks of Hazara basin and ofPotwar basin. It suggeststhat Margalla Hill
Limestone of Hazaraand the Sakesar limestone of Potwarbasins are product of different
environments of deposition.The analyses of benthic foraminifers suggest that the deposition of
the Paleogene sequence occurredin warm and shallow marine environments.
