Structural Geology of the HimalayaP. S. Saklani |
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Page 67
... augen are quite common ( Fig . 5d , e ) . The shape of the crystals are subidiomorphic to completely idiomorphic ; ( iii ) the third type of augen occurs in opthalmatic or augen gneiss characterised by the augen ( Figs . 6e , f ; 7d ) . The ...
... augen are quite common ( Fig . 5d , e ) . The shape of the crystals are subidiomorphic to completely idiomorphic ; ( iii ) the third type of augen occurs in opthalmatic or augen gneiss characterised by the augen ( Figs . 6e , f ; 7d ) . The ...
Page 69
... augen structures with relicts of country- rocks indicate that such bands were preferably dissolved on account of their mineralogical composition whilst others retained the original character ( Mehnert , 1968 ) . Formation of augen with ...
... augen structures with relicts of country- rocks indicate that such bands were preferably dissolved on account of their mineralogical composition whilst others retained the original character ( Mehnert , 1968 ) . Formation of augen with ...
Page 232
... Augen gneiss : It looks like an augen embrechite . Quartz , microcline , oligoclase , biotite , muscovite and garnet are the main mineral components . In some beds , subrounded cobbles of potash felspar containing concentric inclusions ...
... Augen gneiss : It looks like an augen embrechite . Quartz , microcline , oligoclase , biotite , muscovite and garnet are the main mineral components . In some beds , subrounded cobbles of potash felspar containing concentric inclusions ...
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