Girnar is an ancient hill in Junagadh, Gujarat, India. Mount Girnar is a major igneous plutonic complex which intruded into the basalts towards the close of the Deccan Trap period. The rock types identified in this complex are gabbros, diorites, lamprophyres, alkali-syenites and rhyolites. The parent gabbroic magma is shown to have given rise in sequenc…Girnar is an ancient hill in Junagadh, Gujarat, India. Mount Girnar is a major igneous plutonic complex which intruded into the basalts towards the close of the Deccan Trap period. The rock types identified in this complex are gabbros, diorites, lamprophyres, alkali-syenites and rhyolites. The parent gabbroic magma is shown to have given rise in sequence to diorites, lamprophyres and alkali-syenites. The rhyolite, though earlier considered a product of differentiation, is now believed to be an independent magma without any genetic link with the gabbro and its variants.