Anjira Fm

Ferozabad Gr – upper formation. Holotype section: 12 km east of Anjira village (34 L/7). Author: Fatmi et al., 1990. Reference section: None.

Clayey limestone At the type section, designated by Anwar et al. (1991), the lithology is composed of thin to thick-bedded limestone interbeded locally with partings of marl and calcareous shale. The limestone is grey to dark grey, weathers brownish grey, and is lithographic and fossiliferous. It is marly, shelly, mottled and muddy at places. The marl is grey to greenish grey, weathers brownish grey, soft, flaggy and nodular; the shale is creamy grey and soft. Northward (Kallat-Quetta region), it represents same lithology except that the limestone is very thick bedded, peletal, hard, fractured, biosparitic and shelly; it contains chert nodules and shell fragments at places. At Duddar the formation is host to a large Sedex-type Pb/Zn deposit. At Gunga, the formation is host to API grade barite mined at the surface.

Thickness: 100-352 m. The formation is 110 m thick at the type section, 168 m in the Goru section, 312 m in the Ferozabad section, 100 m in the Lukh Rud section and 352 m Kharari section.

Trigonia sp., Spiriferina sp., Terabratula sp.; gastropods, Polyplectus sp., Bouleiceras nitescens; Bouleicera s cf., arabicm fuciniceras sp., Tachylytoceras sp., Grammoceras , Protogrammoceras, Hammatoceras sp., Phylsiogrammoaera sp., Dispansum (upper Toarcian) were collected from Anjira section. Dumorlieceras menaghini, Protogrammoceras sp. (lower Toarcian), Hammatoceras sp. (upper Toarcian) and Nanolytoceras (Bajocian) were collected from Gunga section. Ferozabad section also yielded Toarcian fauna.

The sediments were deposited on a gently sloping ramp or platform margin.

EMW: Lead-Zinc and Barite.