Records of the Geological Survey of India, Volume 128, Part 4The Survey, 1996 - 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. |
From inside the book
Results 1-3 of 15
Page 27
... places . Argil- laceous component is predominant . -Base not seen- A polymictic conglomerate horizon marks the contact between Middle and Upper Barail Formations . Mostly gravel size clasts of quartz , feldspar , chert , chalcedony ...
... places . Argil- laceous component is predominant . -Base not seen- A polymictic conglomerate horizon marks the contact between Middle and Upper Barail Formations . Mostly gravel size clasts of quartz , feldspar , chert , chalcedony ...
Page 70
... places faulting . Petrological studies reveal that the Khasi Greenstones vary from gabbro to dolerite and basalt in nature . Petrochemistry indicates unaltered primary magma of tholeiitic basalt . Fine grained dissemenated pyrite and ...
... places faulting . Petrological studies reveal that the Khasi Greenstones vary from gabbro to dolerite and basalt in nature . Petrochemistry indicates unaltered primary magma of tholeiitic basalt . Fine grained dissemenated pyrite and ...
Page 71
... places ( Fig 22 ) . They occur both as concordant and discordant igneous intrusives in the Shil- long Group . At some places they are emplaced along the planes of weakness like tensional fractures as dykes and apophyses . The greenstone ...
... places ( Fig 22 ) . They occur both as concordant and discordant igneous intrusives in the Shil- long Group . At some places they are emplaced along the planes of weakness like tensional fractures as dykes and apophyses . The greenstone ...
Contents
LIMESTONE INVESTIGATION Ops I Meghalaya | 6 |
An Overview | 17 |
Quaternary geology and geomorphological mapping of the Brahmaputra Valley | 23 |
Copyright | |
Other editions - View all
Common terms and phrases
Aizawl AIZAWL DISTRICT arenaceous argillaceous Arunachal Pradesh Assam bands Barail Group Bhuban Formation biotite Bokabil borehole CACHAR clay coal Code comprises Dauki Fault Dibang Valley Disang Group DIVISION An Overview dolomite East Siang Eocene erosion excavation exposed field season fold Geoenvironmental geotechnical gneiss granite granitoids grey indicate JAINTIA HILLS DISTRICT joint KALIYANI LINEAMENT Karbi Anglong District Khasi Greenstones Kopili Kumar limestone Litang lithostratigraphy lithounits located medium grained Meghalaya mineral mineralisation Mizoram molybdenite Mukatung Nagaland NE-SW North Eastern Region occur overlain pegmatitic power house prone areas Quaternary Ranganadi river rockmass samples sandstone scale schist sediments Sela Group sequence shale shear Shella Formation Shillong Siang District Sibsagar siltstone slope soil sq.km structure Surma Surma Group Survey of India Sylhet synclinal systematic geological mapping tectonic Tertiary thick TINSUKIA DISTRICT tion Tipam Group toposheet traverse trend TRIPURA tunnel ultramafic Unconformity West Kameng district zone