________________
THE PALAEOLITHIC PERIOD
employed by Krishnaswamyl and Paterson in connection with the laterite tracts near Madras, is ruled out in the present case.
Dunn has remarked—“The Subernrekha river, in a region in the Singbhum district, lying less than 20 miles from Kuliana, shows evidence of late Tertiary uplift. There are terraces on its banks and it has also cut down to a level 60 ft. below the basel gravel of an older alluvium.” Hence, inspite of a careful research, no satisfactory evidence was obtained of recent rejuvenation. There was proof of corration, but not of the degradation of the streambed. No terraces were observed lying above the reach of the present river. A few pebbles and boulder-beds were noticed overlying clay of the kind found above the Middle Miocene ostrea limestones of Mahulia. There must have been uplift in this region after Middle Miocene times. But when did it actually take place is not sure. The boulder beds by the river bank could not again be satisfactorily equated with that found in Quarry 'C'. The edge of the latter, hence, remains obscure.
The ostrea beds of Mahulia and farther north prove that the sea extended up to that point atleast in Miocene times. But whether an arm reached right upto Sargachira and Kamarpal, where the Archaean beds seem to end, can only be established on the basis of the above examination.
At present the age of the boulder conglomerate of Kamarpal and its neighbourhood remains uncertain. They cannot also be equated with the bed exposed by excavations
1. Jour. Madras Geog. Assn, 1938, Vol. XIII, Pt. I, pp. 58-90. 2. Studies in the Ice Age in India and Associated Human Cultures,
1939, pp. 327-30. 3. Journal & Proceedings of the As. Soc. of Bengal, Vol. XXIX,
1933, p. 285.
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