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 54
... phenocrysts in hand specimens , but its presence as phenocrysts is indicated by shining reddish brown flakes of iddingsite , as in flow Bu - 8 . In most porphyritic flows the plagioclase pheno- crysts measure upto a maximum of 0.5 cm in ...
... phenocrysts in hand specimens , but its presence as phenocrysts is indicated by shining reddish brown flakes of iddingsite , as in flow Bu - 8 . In most porphyritic flows the plagioclase pheno- crysts measure upto a maximum of 0.5 cm in ...
Page 60
... phenocrysts ( 1.0 % to 12.5 % ) and occurs in all the flows . The plagioclase phenocrysts are idiomorphic and occur as subhedral to euhedral laths and tabular crystals upto 5 mm or more in length and often form glomeroporphyritic aggre ...
... phenocrysts ( 1.0 % to 12.5 % ) and occurs in all the flows . The plagioclase phenocrysts are idiomorphic and occur as subhedral to euhedral laths and tabular crystals upto 5 mm or more in length and often form glomeroporphyritic aggre ...
Page 65
... Phenocrysts of plagioclase felspar ( An 65 to An 71 ) , olivine ( pseudomor- chlorite phed by serpentine , and iddingsite ) and augite . Phenocrysts often in aggregate . Inclusions in pla- ioclase phenocrysts common . Groundmass ...
... Phenocrysts of plagioclase felspar ( An 65 to An 71 ) , olivine ( pseudomor- chlorite phed by serpentine , and iddingsite ) and augite . Phenocrysts often in aggregate . Inclusions in pla- ioclase phenocrysts common . Groundmass ...
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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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