Records of the Geological Survey of India, Volume 113, Parts 5-6Government of India, 1980 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 49
... glass and lithic material with occasional fragments of shale and siltstone , in a matrix composed of glass shards , dusty ash and minor proportion of ferru- ginous material . It has been observed that lapilii tuffs generally contain a ...
... glass and lithic material with occasional fragments of shale and siltstone , in a matrix composed of glass shards , dusty ash and minor proportion of ferru- ginous material . It has been observed that lapilii tuffs generally contain a ...
Page 60
... glass . matter , - Plagioclase Felspar Plagioclase ( An60 An 75 ) constitutes ; a dominant phase among the phenocrysts ( 1.0 % to 12.5 % ) and occurs in all the flows . The plagioclase phenocrysts are idiomorphic and occur as subhedral ...
... glass . matter , - Plagioclase Felspar Plagioclase ( An60 An 75 ) constitutes ; a dominant phase among the phenocrysts ( 1.0 % to 12.5 % ) and occurs in all the flows . The plagioclase phenocrysts are idiomorphic and occur as subhedral ...
Page 61
... Glass or Mesostasis : Pale brown interstitial glass and / or mesostasisi . e . fine grained mixture of crystalline and apparently amorphous material that solidified in the last stages of groundmass crystallisation are present in all the ...
... Glass or Mesostasis : Pale brown interstitial glass and / or mesostasisi . e . fine grained mixture of crystalline and apparently amorphous material that solidified in the last stages of groundmass crystallisation are present in all the ...
Contents
Geochemical distribution of Trace Elements Over the mineralised fault zone PAGE | 1 |
Geology of parts of Abujhmar area Narainpur Tehsil Bastar district Madhya | 24 |
Geological and Petrographic Studies of the Deccan Basalt Flows | 33 |
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Common terms and phrases
Abujhmar alluvium Ambadongar anorthosite associated augite basalt flows basin beds biotite block bore holes borehole breccia Buldana calcite Charnockite chert chlorite clay clinopyroxene Deccan Trap deposits depth district drainage drilled dykes erosional exhibit exposed fault felspar fluorite folds formation fossil fragments gabbro geochemical Geol Geological Survey geomorphic glass gm/tonne gneisses grade grained granite granulites greisens grey groundmass Group Gundul hill indicated laterite lava layers limestone magnetite Maharashtra metasediments metres migmatite mineralisation minerals Narmada Valley NW-SE occurs olivine opaque phenocrysts phosphorite phyllite plagioclase Plate porphyritic present pyrite pyroclastic pyroxene quartz quartz veins quartzite Quaternary region Rhyolite river rocks samples sandstone schist seam sediments sequence shale slope spores stream stromatolites structure sub-surface sulphide surface Surv Survey of India Tapti thick thin trending tuff Unpublished GSI Report upto Vaghur varies volcanic width zone