Age, Palaeoenvironment, and Palaeogeographic Implications of Ostracod Fauna from Upper Nimar Sandstone (Bagh Group) of Jhabua and Alirajpur Districts, Madhya Pradesh

The rocks of Nimar Sandstone Formation directly restover Pre-Cambrian basement rocks exposed at several places near Pipaldehla, Sajwani (Gola Chhoti) Dhekal Badi, Tikadi Moti, Ranapur, Rajla, Para, Akholi, Udaigarh (Kanas) and many more places in Jhabua and Alirajpur Districts of Madhya Pradesh. The present paper deals with the ostracods fauna recorded from the Pipaldehla (N 22°46' E 74°39'), Sajwani (N 22°69’ E 74°59’), Dhekal Badi (N 22°71’ E 74°56’), Tikadi Moti (N 22°70’ E74°55’), Ranapur (N 22°38’ E 74°32’), Udaigarh (N 22°52’ E 74°54’) localities. Fifty ostracod species belonging to twenty-six genera have been reported from upper calcareous Nimar Sandstoneof these twenty-eight species are assigned to previously known species, while the remaining nineteen species are new and three species are left in open nomenclature. The overall ostracod fauna suggests an early Turonian age. Palaeobiogeography and age are discussed based on ostracods and other faunal groups recorded from the Bagh Group.