Granites are distributed in three parallel belts in Nepal Himalaya 1. Paleozoic Granites · They are Cambro-Ordovician age. · They are found in thrust sheets of Lesser Himalaya, Kathmandu Nappe and Dadeldhura Nappe. · The granites are made up of biotite-rich and tourmaline-rich varieties . · They are closely associated with the adjacent gneisses, which display a similar mineral composition. · Several concordant, tabular granite bodies, up to 200 m thick, are intruded. · Some well-known bodies are Palung Granite, Agra Granite, Dadeldhura Granite 2. Higher Himalaya Leucogranites · They are of Tertiary age and occur as several plutons, very many dikes, and veins. · Early to Middle Miocene Leucogranites · These igneous rocks are mainly concentrated towards the top part of the migmatitic gneisses in the Tibetan slab · Tourmaline is so frequent in the granite that they are sometimes called the tourmaline grani