IJSRP, Volume 2, Issue 12, December 2012 Edition [ISSN 2250-3153]
Anis, Abdullah Khan, Shahnawaz, Sarwar Rais
Permo-Cretaceous, intracratonic Satpura Gondwana succession unconformably overlies the Precambrian Basement. The lowermost Talchir unit of Satpura succession comprises of glacio-marine and glacio-fluvial deposits. However, the succeeding the successions largely represent a variety of fluvial depositional systems with some records of fluvio-deltaic and fluvio-lacustrine sedimentation under a variety of climatic conditions including cold, warm, arid, subhumid and semiarid. The approximately 5 km thick succession comprises of Talchir, Baraker, Motur, Bijori, Pachmarhi, Denwa, Bagra and Jabalpur formations. The present study is confined to Early Triassic Pachmarhi Formation. On the basis of lithological characters six lithofacies were identified and their lateral trends at the measured section were studied: (1) Planar cross-bedded sandstone (Sp) facies, (2) Trough cross-bedded sandstone (St) facies, (3) Horizontally bedded to gentally inclined sandstone (Sh) facies, (4) Massive to faintly cross-bedded sandstone (Sm) facies; (5) Pebbly sandstone (Pb-S) facies, (6) Small scale ripple fine grained sandstone (Sr) facies were recognized in Pachmarhi Formation. Lithofacies characters and multistory sandstone bodies which are parallel to depositing streams is product of longitudinal bars and locally diagonal/transverse bars of low sinuosity braided streams. It is suggested that Pachmarhi sandstones are deposited in a braided river system under warm, humid to subhumid climatic conditions.
Anis, Abdullah Khan, Shahnawaz, Sarwar Rais (2018); Sedimentary Facies and Depositional Environment of Early Triassic Pachmarhi Formation, Satpura Gondwana Basin, Central India, Madhya Pradesh;
Int J Sci Res Publ 2(12) (ISSN: 2250-3153). http://www.ijsrp.org/research-paper-1212.php?rp=P12523