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
... grains of the same minerals and with silica . Quartz grains show some secondary growth and the grains are welded with siliceous cement . Some voids are present pro- bably caused by the leaching of weathered felspar . The felspars ...
... grains of the same minerals and with silica . Quartz grains show some secondary growth and the grains are welded with siliceous cement . Some voids are present pro- bably caused by the leaching of weathered felspar . The felspars ...
Page 201
... 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 as poikilitic inclusions in microcline ...
... 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 as poikilitic inclusions in microcline ...
Page 215
... grains arranged in parallel rows , giving a schistose appearance which is also due to the more or less parallel arrangement of the small flakes of muscovite . There are also small grains of tourmaline , epidote , hematite , ilmenite and ...
... grains arranged in parallel rows , giving a schistose appearance which is also due to the more or less parallel arrangement of the small flakes of muscovite . There are also small grains of tourmaline , epidote , hematite , ilmenite and ...
Contents
Son Valley in Mirzapur district U P by F Ahmad | 1 |
Some Geological factors influencing the behaviour of | 42 |
The Snout of the Machoi Glacier Kashmir by | 51 |
Copyright | |
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acid actinolite analyses Auden basalt bauxite beds Bilaspur boulders breccia brown cent by weight chemical chert chrome-rich suite chromite chromite deposits clay colour composition concentration conglomerate crystallisation crystals district dolerite dumortierite east epidote exposed faults felspar fine-grained flows folded formation formed fossils fraction friable garnet Geol Geological Survey Ghumarwin glacier grains granite grey Haritalyangar hill horizon igneous ilmenite indicated Konal Kosi laterite layers limestone Lower magma magnetite mapping material metres Middle Siwalik minerals multiple dykes multiple intrusions Mussoorie occur orthopyroxenite overlying Oxide P₂O pebbles pelitic phosphate phosphorus phyllites plagioclase porcellanites Pradesh present 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 types ultrabasic ultrabasic rocks unconformity Upper valley veins Vempalle Vindhyan system volcanic wall rocks zone