Structural Geology of the HimalayaP. S. Saklani |
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Page 50
... quartz . Biotite is quite sporadic as compared to muscovite and is associated with prisms and needles of sillimanite ... quartz ( plagioclase ) ( ii ) Biotite - garnet - quartz ( plagioclase ) ( iii ) Muscovite - biotite - quartz ( + ...
... quartz . Biotite is quite sporadic as compared to muscovite and is associated with prisms and needles of sillimanite ... quartz ( plagioclase ) ( ii ) Biotite - garnet - quartz ( plagioclase ) ( iii ) Muscovite - biotite - quartz ( + ...
Page 82
... QUARTZ FABRIC ANALYSIS Preferred lattice orientation defined by the c - axes of quartz is developed in a rock in response to deformation during metamorphism . The poles of optic axes in such cases exhibit certain characteristic ...
... QUARTZ FABRIC ANALYSIS Preferred lattice orientation defined by the c - axes of quartz is developed in a rock in response to deformation during metamorphism . The poles of optic axes in such cases exhibit certain characteristic ...
Page 83
... QUARTZ FABRIC DATA Introductory Remarks : The symmetry pattern of the quartz fabric represents the kinematics . of rock deformation . A higher order of symmetry emerges from rocks undergoing single phase of deformation . Symmetry of the ...
... QUARTZ FABRIC DATA Introductory Remarks : The symmetry pattern of the quartz fabric represents the kinematics . of rock deformation . A higher order of symmetry emerges from rocks undergoing single phase of deformation . Symmetry of the ...
Common terms and phrases
Almora anatexis anticline augen axes axial plane Badrinath basin beds Bhattacharya biotite Blaini cleavage Delhi developed direction earthquakes eastern Eocene F₂ fabric facies fault folds foliation Gansser Garhwal Garhwal Himalaya garnet Geol gneiss grained granitic gneisses Himalaya Indian Indian plate Indo-Pakistan Jour Jutogh Kashmir Klootwijk Krol Belt Krol thrust Kumaun Kumaun Himalaya Ladakh Lesser Himalaya limestone Lingtse Gneiss Lower Main Boundary Main Central Thrust metamorphism mica schist micaceous Middle Siwalik migmatite mineral lineation Mukhem mylonitic Naini nappe Nepal observed occur ophiolite orientation Pakistan palaeomagnetic parallel phase of deformation phyllite plagioclase porphyroblastic quartz quartzite Quetta region rocks rotation S₁ S₂ Saklani sandstone schist schistosity sedimentary sediments seismicity sequence shales shear Simla Sinha Roy Siwalik Siwalik Formation slate stratigraphic structures Surv Suture Zone syncline tectonic tectonites thrust sheet thrust zone Tibetan slab tourmaline trend units Upper Valdiya valley volcanics