Occurrence of nontronite in amygdales of Deccan basalts at ...
Highway. One such quarry located about km north of Satara, Marashtra exposes the basaltic lava flows in a m deep cut. Here, a m thick, vertically jointed compact basalt is overlain by 10 m thick, grey, amygdaloidal basalt. The amygdales are made up of greenishgrey clay mineral (Figure 1). The amygdales range in size from to