S. No

Formation

Age

Lithology

1

Siwalik group

Mio-Pliocene

Conglomerate, Sandstone and Clay

2

Laki Formation

Eocene

Limestone, shale and sandstone

3

Lakhra Formation

Late Paleocene

Limestone, shale and sandstone

4

Bara Formation

Middle Paleocene

Sandstone, Shale and shale