Prehistory and Protohistory in India and Pakistan c7.s14.3

c7.s14.3

The region is rich geologically, but much of it is hidden by blown sand and alluvium. While the eastern zone preserves some of the oldest rock formations in the Aravallis—like the granites, quartzites and chists, the Western, on either side of the Luni and around Jodhpur, exhibits later formations—rhyolites (a volcanic rock), sandstones and limestones. The former—quartzite—has been principally used by Early Man in Eastern Rajputana. In the latter, his successor had to fall back upon occasionally on the high acidic rhyolites, but largely on the cherts and flints which form in the cavities of limestone.