Stratigraphic and Sedimentologic Evolution of the Proterozoic Siliciclastics in the Southern Part of Chhattisgarh and Khariar, Central India

The Proterozoic siliciclastic successions in the southern part of Chhattisgarh around Panduka village, Raipur dt., Madhya Pradesh and in the northern part of Khariar plateau around Nawapara, Nawapara (North Kalahandi) dt., Orissa consist of three comparable formations namely, the Lohardih, the Chaporadih and the Kansapathar Formations of the Chandarpur Group of the Chhattisgarh Supergroup. The evolution of the sedimentary successions in both the areas follows identical succession of events, i.e., an initial progradation and a subsequent transgression-regression phase. Palaeoslope of both the areas was towards south/southeast and the palaeo-shoreline trend was ENE-WSW to NNE-SSW. Marine transgression occurred from southeast. Environmental and palaeocurrent analyses suggest that the siliciclastic successions at Panduka and Khariar, separated by a wide stretch of crystallines, developed in different parts of the one and same basin, the Panduka area represents the proximal part whereas the Khariar plateau represents the distal part.