INDIAN GEOGRAPHY

Detailed explanation-1: -The vast alluvial plain tract of north India is devoid of minerals of economic use.

Detailed explanation-2: -The vast alluvial plains of north India are almost devoid of economic minerals. (2) Causes of these variations are differences in the geological structure, processes and time involved in the formation of minerals.

Detailed explanation-3: -Northern Plains: The vast alluvial plains of north India are almost devoid of economic minerals. These variations exist largely because of the differences in the geological structure, processes and time involved in the formation of minerals.

Detailed explanation-4: -The alluvial plains of Northern India are devoid of any minerals. However, most of the metallic minerals in India occur in the peninsular plateau region in the old crystalline rocks. Around 97% of coal deposits are found in the Damodar, Sone, Mahanadi and Godavari valleys.