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 Chha ttisgarh around Panduka village, Raipur dt., Madhya Pradesh and in the northern part of Khariar plateau around Nawapara, Nawapara (North Kal ahandi) dt., Orissa consist of three comparable formations namely, the Lohardih, the Chaporadih and the Kansapathar Formations of the Chanda rpur Group of the Chhattisgarh Supergroup. The evolution of the sedime ntary successions in both the areas follows identical succession of ev ents, i.e., an initial progradation and a subsequent transgression-reg ression phase. Palaeoslope of both the areas was towards south/southea st and the palaeo-shoreline trend was ENE-WSW to NNE-SSW. Marine trans gression occurred from southeast. Environmental and palaeocurrent anal yses 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 proxi mal part whereas the Khariar plateau represents the distal part.