Memoirs of The Geological Survey of India. The Economic Geology and Mineral Resources of Bihar Province

It may be noticed that where the Subarnarekha cuts across the line of the Dalina range the lavas of the range have been denuded down to the level of the mica-schist plains for a strike distance of several miles. [...] We may, therefore, accept the original level of the pre-Tertiary peneplain as being rather lower than the present level of the base of the lavas along the western scarp of the Rajmahal hills. [...] Along the northern side, however, the tendency 'west of the Rajmahal hills has been towards a steepening of the tilt, culminating in the sharp warp represented by the fall in elevation from Kodarma to the plains of Gaya, and this characteristic continues across to the scarp face of the Kaimur plateau. [...] L Poreenaitito stag, The principal basins of the Gondwana rocks are distributed in an east-west belt, parallel to the general structural trend of the Archeans, and conforming approximately to the direction of the Auranga and Dainodar valleys, from the Hutar coalfield in the west to the Jharia and Raniganj coalfields in the east. [...] It is apparent that over the greater part of the Gangetic plains the intake of the deep-seated water-bearing strata is not the immediate surface, but is closer to the edge of the alluvium, and much of the water has travelled underground from as far afield as . the United Provinces and the Punjab.