Records of the Geological Survey of India, Volume 94The Survey, 1959 - Earthquakes 1867- includes the "Annual report of the Geological survey of India". |
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Page 191
... amphibole bearing quartzites are light to dark grey and massive to schistose , the depth of colour and the degree of schistosity increasing with the amphiboles present in the quartzites . The amphiboles usually occur as minute needles ...
... amphibole bearing quartzites are light to dark grey and massive to schistose , the depth of colour and the degree of schistosity increasing with the amphiboles present in the quartzites . The amphiboles usually occur as minute needles ...
Page 195
... amphibole bearing quartzites . In thin sections , the chief minerals noticed are quartz , magnetite , hematite , amphibole and pyroxene as given below in Table 6 . TABLE 6 Modal analyses of banded magnetite - hematite quartzites ...
... amphibole bearing quartzites . In thin sections , the chief minerals noticed are quartz , magnetite , hematite , amphibole and pyroxene as given below in Table 6 . TABLE 6 Modal analyses of banded magnetite - hematite quartzites ...
Page 207
... amphibole is associated with this sub - facies if the sediments had iron and magnesia in excess . The various non - ferruginous quartzites cropping out in the area fall under the group of quartz - felspar rocks and all of them show the ...
... amphibole is associated with this sub - facies if the sediments had iron and magnesia in excess . The various non - ferruginous quartzites cropping out in the area fall under the group of quartz - felspar rocks and all of them show the ...
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Common terms and phrases
Ajanta Caves amphibole amphibole bearing quartzites amygdaloidal assemblage Balasore Balasore coast basalts beds biotite calc-silicate rocks calcite cent chambers chondrules Coarse colour convolute laminations Cretaceous crystals Deccan Traps dipping district dolerites dune sands dykes east enstatite felspar ferruginous Figured specimen flows folds foraminifera formations G.S.I. Type garnet Genus Geol Geological Geologist Gir forest grade grains granites heavy mineral hematite hills hornblende ilmenite intergrowth kilometres kyanite length Lenticulina limestone magnetite manganese manganese content manganiferous khondalite Marginulina massive trap meta-sediments metamorphism meteorite metres metres long metres wide nala Nishkhal north-west occur old dunes olivine opaques Orissa outcrop phenocrysts plagioclase porphyritic porphyritic trap pyroxenes quartz quartzites Rajasthan Reuss ridge rutile samples sand dunes Sastry schistosity sediments shales siliceous sillimanite Soft vesicular species Subarnarekha river Surv sutures thickness thin trend Trichinopoly Utatur stage veins vesicles vesicular trap width zircon