Intrabasinal Differential Subsidence and its Influence on Coal Thickness Configuration, Barakar Formation, Sohagpur Coalfield, Madhya Pradesh

Spatial and temporal variations in small·scale subsidence pattern in a part of Sohagpur Coalfield have been identified and mapped using the method of graphic correlation. Subsidence was differential at the initial stage which later gave way to a tectonically stable condition of deposition. Lateral variations in thickness and continuity of mineable coal seams, however, cannot be satisfactorily explained in terms of relative rates of subsidence only. Geometric properties of the coal seams instead reveal a dominant control of depositional environment on seam morphology.