An Encyclopaedia of Indian Archaeology v2.c40.260

v2.c40.260

Owing to the occurrence of the same type of mammalian species in the lower and upper groups of the Older Alluvium of the c. Narmada and due to lack of suitable material for absolute dating of the Stone Age the stratigraphy as based on observations of the exposed river sections is somewhat defective. This is also borne out from the bore-hole data. The alluvium in the c. Narmada reaches at places a depth of nearly 150 to 200 m. The boulder beds are generally seen throughout the depth and are commonly encountered near the steep escarpment of the Vindhyan hills on the n. Bore-hole data also show that the Narmada had swung from s. to n. during the Pleistocene.