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 199
... less than 5 × 25 × 51 mm . in size . Veins . - Minor veins and lenses , 1 to 150 mm . thick , of quartz and felspar are seen in almost all the rock types of the area . They have been formed along steep dipping joints which have a strike ...
... less than 5 × 25 × 51 mm . in size . Veins . - Minor veins and lenses , 1 to 150 mm . thick , of quartz and felspar are seen in almost all the rock types of the area . They have been formed along steep dipping joints which have a strike ...
Page 213
... less often , olivine . These rocks usually have vesicles , amygdules or geodes . The largest geodes range in size from 13 to 15 cm . but many of them are much smaller , being usually less than 2.5 cm . across . Irregularly rounded and ...
... less often , olivine . These rocks usually have vesicles , amygdules or geodes . The largest geodes range in size from 13 to 15 cm . but many of them are much smaller , being usually less than 2.5 cm . across . Irregularly rounded and ...
Page 226
... less , sub - rounded or irregular grains , showing high birefringence . Zoisite has mostly a broken and angular appearance and shows in most cases ana- molous extinction often marked by an ultrablue colour . Micas . Micas are ...
... less , sub - rounded or irregular grains , showing high birefringence . Zoisite has mostly a broken and angular appearance and shows in most cases ana- molous extinction often marked by an ultrablue colour . Micas . Micas are ...
Contents
GEOLOGICAL SURVEY OF INDIA | 190 |
STRUCTURE | 200 |
SUMMARY AND CONCLUSIONS | 209 |
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Common terms and phrases
amphibole amphibole bearing quartzites amphibolites amygdaloidal aperture Balasore banded magnetite-hematite quartzites basalts beds biotite calcite cent chambers chondrules colour convolute laminations Cretaceous Deccan Traps deposits 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 gneisses grade grains granites grey quartzites heavy mineral hematite hornblende ilmenite intergrowth Kalahandi kilometres kyanite length Lenticulina limestone magnetite manganese content manganese-ore manganiferous khondalite Marginulina massive trap meta-intrusives meta-sediments metamorphism metres metres long metres wide Nishkhal occur old dunes olivine opaques outcrop pebbles phenocrysts plagioclase porphyritic porphyritic trap pyroxenes quartz quartzites Reuss ridge rutile samples sand dunes schistosity sediments shales siliceous sillimanite Soft vesicular species Subarnarekha Subarnarekha river Survey of India sutures thickness thin trend Utatur stage veins vesicles vesicular trap white gritty quartzites width Yerabali zircon