Figure 4 – Peninsular block

This region contains all types of rocks - igneous, metamorphic and sedimentary rocks. For instance, limestone, sandstone sedimentary rocks are found in river valleys. Coal belts of Peninsular India were developed during the Gondwana period. The black soil of Deccan is due to outpouring of huge quantity of lava during Cretaceous period.

The northern boundary of the Peninsular Block may be taken as an irregular line running from Kutch along the western flank of the Aravali Range near Delhi and then roughly parallel to the Yamuna and the Ganga as far as the Rajmahal Hills and the Ganga delta (figure 4). Apart from these, Rajasthan in the west and the Karbi Anglong and the Meghalaya Plateau in the northeast are also extensions of this block. The northeastern parts are separated by the Malda fault in West Bengal from the Chotanagpur plateau. In Rajasthan, the desert and other desert–like features overlay this block.