Records of the Geological Survey of India, Volume 115

alteration Andaman appears assemblage associated bands basalt basin batholith beds blocks bodies characteristics chemical chert chromite composition comprises conglomerate contain continuous Cretaceous crystalline cumulate developed diorite Dras Volcanic dunite dyke east eastern emplaced exposed extends facies folded Formation gabbro Geol Geological graded grains granite green grey harzburgite highly Himalaya India indicate Indus Group intrusive islands Ladakh Ladakh Granitoid Lamayuru limestone lower mafic mass Member metamorphic mineral nala nature Nicobar Nindam Formation northern nummulitic obducted occur oceanic olivine ophiolite belt ophiolite complex ophiolitic melange overlying peridotite pillow lavas places present purple range region represents rocks samples sandstone Sangeluma sector sedimentary sediments seen sequence serpentinite shale sheared Shergol Shyok siltstone southern Srikantia structure studies suite Surv tectonic Tectonic Zone texture thick thin thrust tion trend types ultramafic ultramafites unit upper valley varying western Zanskar zone