Records of the Geological Survey of India, Volume 112, Part 7The Survey, 1982 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
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Page 89
... felsite , rhyolite and tuffaceous rocks , and granite porphyry . Bluish grey quartz felsite is felsophyric with phenocrysts of high temperature anhedral quartz and clouded alkali felspar which are lying within the felsitic groundmass ...
... felsite , rhyolite and tuffaceous rocks , and granite porphyry . Bluish grey quartz felsite is felsophyric with phenocrysts of high temperature anhedral quartz and clouded alkali felspar which are lying within the felsitic groundmass ...
Page 90
... felsite are common within granite porphyries ( Fig . 2 ) . Dykes of rhyolite have been observed within quartz felsite ( Fig . 3 ) . These facts indicate that the emplacement of quartz felsite was earlier and which was subsequently follo ...
... felsite are common within granite porphyries ( Fig . 2 ) . Dykes of rhyolite have been observed within quartz felsite ( Fig . 3 ) . These facts indicate that the emplacement of quartz felsite was earlier and which was subsequently follo ...
Page 94
... felsite was formed in the earlier stage from rapidly cooling acid magma starting with a glassy phase which was later devitrified into felsitic rock . Occasional spherulites within felsitic groundmass indicate the effects of ...
... felsite was formed in the earlier stage from rapidly cooling acid magma starting with a glassy phase which was later devitrified into felsitic rock . Occasional spherulites within felsitic groundmass indicate the effects of ...
Contents
Coastal geomorphology of Bhavnagar Gujarat India O | 1 |
Sediments of river Mendhaan admixture of humid and arid epoch | 11 |
CONTENTS | 16 |
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Ajabgarh Group albite Alwar Group Aravalli Aund axial Banded Gneissic Complex Bari Sadri basin Bayana beds Berach Granite Bhadesar Bhavnagar biotite Buchara Bundelkhand Gneiss calcite chert chlorite colour conglomerate country rocks cross-bedding Delhi Delhi Supergroup deposits district dolomite east eastern emplacement epidote facies fault felsite felspar felspathic ferruginous folds foliation fractures Geol Geological Survey geosynclinal cycle Gneiss grade grains of quartz granite porphyry grey Gujarat hornblende intrusive Jahaj Jaipur Jogipura Formation Khardeola Khareri Khetri Kushalgarh Kutch limestone magmatic matrix metamorphism metasediments mica schist microcline migmatites mineralisation minerals muscovite NE-SW Nithar northeastern Rajasthan occur oligoclase oolites orthoclase pebbles pegmatite phase phenoclasts phyllites places Pre-Aravalli pre-Delhi quartz quartz felsite quartzite Raialo Rajasthan ripple marks Salenia sand sandstone schist sedimentary sedimentation seen sequence sericite shale shows siliceous Sita slates specimen stratigraphic Supergroup surface Surv Survey of India tectonic terrace thick trend unconformity veins Vindhyan western zone