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 41
... veins are evidenced . Aplite veins appear variously intruding the Berach Granite and Gneiss and are evidently later . Pegmatitic quartz - felspar rock has been seen at a few places . There are later granites which occur in the south ...
... veins are evidenced . Aplite veins appear variously intruding the Berach Granite and Gneiss and are evidently later . Pegmatitic quartz - felspar rock has been seen at a few places . There are later granites which occur in the south ...
Page 80
... veins . op . cit . ) . The felsic parts of the host rock are selecti- vely resolved leaving behind streaks and knots of tremolite in the pegmatite . smaller veins tourmaline crystals are arranged perpen- dicular to the vein walls . The ...
... veins . op . cit . ) . The felsic parts of the host rock are selecti- vely resolved leaving behind streaks and knots of tremolite in the pegmatite . smaller veins tourmaline crystals are arranged perpen- dicular to the vein walls . The ...
Page 81
... veins of pegmatite or aplite occurr- ing in schistose country rocks are most often folded with its axial plane paralleling the axial plane schisto- sity of the country rocks ( Fig . 6 ) . Emplacement of these veins were , therefore ...
... veins of pegmatite or aplite occurr- ing in schistose country rocks are most often folded with its axial plane paralleling the axial plane schisto- sity of the country rocks ( Fig . 6 ) . Emplacement of these veins were , therefore ...
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