Kamthi Sandstones: Grain Size Distribution and Depositional Processes

Grain size distribution of sandstones from the Kamthi Formation is analyzed to evaluate the depositional processes. A group of lithounits from the Kamthi Formation is well exposed in the open cast coal mines of Umrer. The CM pattern and log-probability curves of grain size distribution have been analyzed to deduce the modes of sediment transport and the resultant depostional environment. The CM pattern has brought out traction, saltation and suspension modes of sediment transport, while log-probability curves have shown the dominance of saltation sub-population with minor proportion of suspension. Both these characteristics would suggest fluvial environment for the deposition of sandstones of Kamthi Formation.