Structural Geology of the HimalayaP. S. Saklani |
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Page 19
... developed in most of these rocks and more varie ties of this do occur . However , for descriptive purpose they have been grouped under two broad zones : ( i ) fracture cleavage , and ( ii ) axial plane cleavage . There are several modi ...
... developed in most of these rocks and more varie ties of this do occur . However , for descriptive purpose they have been grouped under two broad zones : ( i ) fracture cleavage , and ( ii ) axial plane cleavage . There are several modi ...
Page 81
... developed mostly by compre- ssion normal to the axial sur- faces of B folds . Variation in the attitude and orientation of S , is mainly by superposed F2 folding . 2 3. It is developed by intense interplanar slip along a direc- tion of ...
... developed mostly by compre- ssion normal to the axial sur- faces of B folds . Variation in the attitude and orientation of S , is mainly by superposed F2 folding . 2 3. It is developed by intense interplanar slip along a direc- tion of ...
Page 85
... developed girdle fabric must have obliterated the earlier one ; and partly due to very sensitive nature of quartz to deformation , so that the lattice orientation pattern mostly represents the result of the last phase of deformation ...
... developed girdle fabric must have obliterated the earlier one ; and partly due to very sensitive nature of quartz to deformation , so that the lattice orientation pattern mostly represents the result of the last phase of deformation ...
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