Paleozoic • Cambrian

Kussak Formation

Early to early Middle Cambrian

Stratigraphic position

In the Salt Range column

SandstoneLimestoneShale / mudFossils recordedUnconformityConformable

Band colour = period; texture = dominant rock type. Lines between bands mark the contact type (wavy = unconformity inferred from a missing period). True scale makes height ∝ recorded thickness; hatched = thickness not recorded. Ages approximate, for ordering.

This unit (highlighted) within its province column; faded ends continue above and below. Line style marks the contact type.

Named after Kussak Fort in eastern Salt Range. Contains thin lenses of fossil asphalt (gilsonite). Rich in trilobites including Redlichia noetlingi. Part of the Khewra Group.

Significance. First major marine transgression in Salt Range; yields Early Cambrian trilobites; contains gilsonite

Lithology: Glauconitic and micaceous sandstone, siltstone, dolomite interbeds
Thickness: 50-100 m
Type locality: Kussak Fort, eastern Salt Range

Fossils

Trilobites (Redlichia noetlingi)Brachiopods (Neobolus warthi, Lingulella)Hyolithes wynnei

Provinces

Salt Range Kohat Basin Potwar Basin

Related units

Below · older

Khewra Sandstone

Cambrian

Above · younger

Jutana Formation

Cambrian