Murree Fm

Rawalpindi Gr. – lowesr formation. Holotype section: North of Dhok Maiki in District Attock. Author: A. B. Wynne, 1874. Reference section: None.

Siltstone to Sandstone. The formation is comprised of a monotonous sequence of dark red to maroon color siltstone and clay interbedded with red, brown and grey color sandstone. The basal strata of the formation consists of light greenish grey calcareous sandstone and conglomerate with abundant derived larger foraminifera of Eocene age; this horizon has been designated as Fatehjang Member after the 'Fatehjang Zone' of Pilgrim (1918); the member also contains vertebrate remains and is about 70 m thick near Fatehjang. In the Kohat area, the formation has a higher percentage of sandstone, which is brown, greenish grey, in places purple and is medium to coarse grained. The formation gives a maroonish hue to the terrain where it outcrops.

Thickness: 180-3,000+ m in outcrops. 544-1,896 m in subsurface. It is just over 3,000 m in northeastern Potwar, but thins out to only 9 m at Banda Daud Shah in southwest of Kohat. The formation ranges in thickness from 180-600 m in the northern SR. In the oil wells drilled in Potwar the encountered thickness from (east to west) at Adhi-5 1,320 m, at Dhermund-1 544 m and at Dakhni-1 it is 1,896 m. Farther west across Indus River at Chanda -1 well, it is 1,190 m thick.

The main body of the formation is poorly fossiliferous and only some plant remains, silicified wood and mammalian bones are recorded. However, the Fatehjang Member has yielded identifiable mammals indicating Anthracotherium bugtiense. Brachyodus giganteus, B. cf. africanus, Palaeochoerus pascoei, Hemimeryx sp., Teleoceras fatehjangensis etc.