Records of the Geological Survey of India, Volume 96Geological Survey of India, 1971 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 57
Geological Survey of India. quartz and felspar interlock with one another giving a mosaic . Quartz , orthoclase , plagioclase ( albite - oligoclase ) , a few pieces of granite , and flakes of muscovite and biotite are seen . Magnetite ...
Geological Survey of India. quartz and felspar interlock with one another giving a mosaic . Quartz , orthoclase , plagioclase ( albite - oligoclase ) , a few pieces of granite , and flakes of muscovite and biotite are seen . Magnetite ...
Page 201
... Quartz : In hand specimens , the quartz grains are usually white . In thin sections the quartz grains are usually xenomorphic , but locally show mosaic texture . The grains commonly show undulose extinction . In places the quartz occurs ...
... Quartz : In hand specimens , the quartz grains are usually white . In thin sections the quartz grains are usually xenomorphic , but locally show mosaic texture . The grains commonly show undulose extinction . In places the quartz occurs ...
Page 215
... quartz ( psammitic ) . The pelitic band shows closely spaced foliation planes , resulting from parallel arrangement ... quartz and the other by mica . The quartz - rich part is composed dominantly of elongated granoblas- tic quartz ...
... quartz ( psammitic ) . The pelitic band shows closely spaced foliation planes , resulting from parallel arrangement ... quartz and the other by mica . The quartz - rich part is composed dominantly of elongated granoblas- tic quartz ...
Contents
Geology of the Vindhyan system in the Eastern part of | 1 |
Some Geological factors influencing the behaviour of | 42 |
5560 | 55 |
Copyright | |
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acid analyses Auden band basalt bauxite beds Bilaspur bodies boulders breccia brown carbonaceous chemical chert chrome-rich suite chromite chromite deposits clay colour composition concentration conglomerate crystallisation crystals district dolerite dumortierite east epidote exposed faults felspar fertilisers fine-grained flows folded formation fossils friable garnet Geol Geological Survey Ghumarwin glacier grains granite grey Haritalyangar hill horizon igneous ilmenite indicated iron Konal Kosi laterite layers limestone limonitised Lower magma magnetite mapping margins material metres Middle Siwalik minerals multiple dykes multiple intrusions Mussoorie nala nodules occur orthopyroxenite overlying Oxide P₂O pebbles pelitic phosphate phosphorus phyllites plagioclase porcellanites Pradesh present psammitic pumicite quartz quartzites river rock phosphate samples sandstones scarp sediments seen shales silica silicified Siwalik Siwalik rocks snout soil structure Sukinda Surv Survey of India syncline TABLE Tadpatri thick thin tourmaline ultrabasic ultrabasic rocks unconformity Upper valley veins Vempalle Vindhyan system volcanic