Meso-Neoproterozoic basins of the Bastar craton

Indravati basin

Chattisgarh basin

(Chattisgarh Supergroup)

Indravati Group

Raipur Group

Formation

Lithology

Tarenga

Formation

Purple shale, and

purplelimestone

Chandi

Formation

Grey and pink

limestone

Gunderdehi

Formation

Pink and purple

shale/grey shale

Charmuria

Formation

Grey limestone/

White to buff clays

Formation

Lithology

Chandrapur Group

Jagdalpur

Formation

Calcareous Shales with purple and gray stromatolitic dolomite

Kansapathar

Formation

White sandstone

Kanger

Limestone

Purple limestone grey limestone

Chopardih

Formation

Reddish brown and

olive green sandstone

Cherakur

Formation

Purple shale with arkosic sandstone and chert pebble conglomerate, grit

Lohardih

Formation

White pebbly

sandstone

Tiratgarh

Formation

Chitrakot sandstone member (quartz arenite)

Mendri sandstone member

(subarkose and conglomerate)

Unconformity

Archean granites, gneisses and older supracrustals (Sonakhan greenstone belt).