Kawagarh Fm

Holotype section: Kawagarh Hills, north of Kalachitta Range (KcR). Author: A. Day (AOC, unpublished report). Reference section: None.

Clayey limestone. The formation in its type locality and adjoining areas of northern Kalachitta Range (KcR), Nizampur and eastern Kohat consists of dark marl, calcareous shale and nodular / argillaceous limestone. In eastern Kohat (Kohat Pass section) dolomitic limestone beds occur in the lower part while further west in Samana Range, Darsamand and Khadimak sections, the formation is typically a lithographic to sublithographic, grey and light grey limestone with subordinate marl and shale. The formation is divisible in western Kohat into two members: (1) an upper Tsukail Tsuk Limestone, which mainly consists of a grey sub-lithographic, thick, bedded to massive, escarpment forming limestone, and (2) A lower Chalor Silli member, which consists of light grey, olive grey, lithographic to sub-lithographic, thin- to medium-bedded limestone with subordinate calcareous shale and marl intercalations in the lower part. In southern Hazara area, the lithology is similar to western Kohat; however, in upper part a Nara Sandstone member, which consists of grey, brownish grey to dark grey, thick-bedded calcareous sandstone with some minor limestone interbeds is recognized. In northern Hazara (Kathwal-Kalapani section), the sandstone member is not developed and the Kawagarh Fm consists of grey, olive grey, light grey sublithographic limestone with subordinate marl and calcareous shale.

Thickness: 40-200+ m. In the type section, its thickness ranges from 40-70 m. In western Kohat, the thickness varies from 110 m (Samna Range) to 120 m (Darsamand section). In eastern Kohat, it varies from 70 m (Taudi Mela section) to 90 m (Mazari Tang section). In Hazara, the thickness varies from 45 m in the south (Changla Gali) to over 200 m (Chanali section). It is 70 m in Kathwal section.

The formation contains Globotruncana lapperenti, G. vaporate, G. concavata carinata, G. vapora - calcarata, Heterohelix reussi, H. globocarinate, H. globolusa etc.