Measured stratigraphic sections of the Lower Permian Nilawahan Group, Salt Range, Punjab Province, Pakistan

S. Geological Survey and funded by the U.S. Agency for International Development, several exposures of the Lower Permian Nilawahan Group in the Salt Range of north-central Pakistan were measured and described during the months of February and March, 1989. Previous work on Lower Permian rocks has been, for the most part, reconnaissance in nature and only the Lower Permian Tobra Formation of the Nilawahan Group has been studied in any detail. Teichert (1967) has conducted the most significant work on the Tobra and has summarized the work of previous studies. He and workers before him recognized that depositional processes associated with glacial activity have played an important role in the depositional history of the Tobra Formation. The purpose of this report is to provide information regarding descriptions, thicknesses, and preliminary stratigraphic correlations of part of the Nilawahan Group. (Excerpt, modified)