Himalaya: geological aspects

Almora amphibolite andalusite assemblages augen gneiss axes axial plane bedding belt Berinag Bhutan biotite Buxa Central Crystallines Chail Chail Nappes chlorite Chomolongma crenulation cleavage defined defonnation developed eastem F2 folds fabric facies faults feldspar field first flattening foliation Fonnation Formation fractures gamet Gansser Garhwal Garhwal Himalaya garnet Geol Geology girdle gneiss Gondwana grade grains granite gneiss Group Himalaya isograd Jour Jutogh Khola Khumbu Krol Kumaun kyanite Lesser Himalaya limestone lithological lower Main Central Thrust Makalu metasediments mica schist micaceous migmatites mineral lineation muscovite mylonitic nappe Nepal northem occur orientation parallel pattem pelitic Phaplu phase of deformation phyllites plagioclase porphyroblasts Pradesh Precambrian quartz quartzite reaction rocks Saklani schist schistosity sedimentary sediments sequence sericite shear significant sillimanite Simla Siwalik Siyom slates southem staurolite stratigraphic strike-slip structural Surv syncline tectonic texture Thimpu thrust sheet thrust zone trend upper Valdiya valley westem