Abstract:
This research work is based on the structural evaluation and problems
associated with the geological mapping of Margalla Hills, Shah Allah Ditta area
Islamabad. In this area repetition and miss matches of the strata indicates the presence
of folds and faults at a map able scale. Main Boundary Thrust, Gramthoon Thrust and
Khanpur Thrust are the major structures present in this area. MBT is the frontal thrust
marked in the field by faulted contact of Jurassic Samanasuk Formation and Murree
Formation. Outcrop folds are observed in the lower member of Margalla Formation
containing this bed of limestone, Marl and Patala Formation. These Outcrop scales
folds are formed as secondary fold in the major folded structures due to competency
contrast and strain accommodation. The chemical weathering of limestone had
obscured the primary bedding foliation so structural mapping in this area through
satellite imagery could yield wrong orientation results, so it must have to check in
field. The fracture are very well developed while often reveals to be the bedding so
proper care must be taken for advance geological mapping in this area.
