Geological Bulletin, Volume 12University of Peshawar, 1979 - Geology |
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Page 13
This resulted in the removal of carbonates and only clastic quartz grains were left
. Presence of clay was ... TEXTURE Texture of sandstones is expressed by the
grain to grain relationship of the framework and the matrix . Framework here is ...
This resulted in the removal of carbonates and only clastic quartz grains were left
. Presence of clay was ... TEXTURE Texture of sandstones is expressed by the
grain to grain relationship of the framework and the matrix . Framework here is ...
Page 14
Carbonate minerals constitute the allochemical and orthochemical fractions , and
make the matrix for detrital quartz grains . Majority of the carbonate grains are
blebshaped , and vary from very fine to medium grained size . In two slides the ...
Carbonate minerals constitute the allochemical and orthochemical fractions , and
make the matrix for detrital quartz grains . Majority of the carbonate grains are
blebshaped , and vary from very fine to medium grained size . In two slides the ...
Page 15
derivation of quartz from granite or gneiss or even older sandstone ( ? ) . The
amount of feldspar deminishes with the increase in the geological age of the
formation . Subrounded to rounded nature of ( a few coarse ) quartz grains is
indicative ...
derivation of quartz from granite or gneiss or even older sandstone ( ? ) . The
amount of feldspar deminishes with the increase in the geological age of the
formation . Subrounded to rounded nature of ( a few coarse ) quartz grains is
indicative ...
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Contents
1979 No | 1 |
Khewra Gorge Khewra Jehluu District | 11 |
Khewra Gorge Khewra Jehlum District | 21 |
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Common terms and phrases
abundant anhedral appears Baghanwala Formation basal base basin biotite brown Bull calcarenite calcareous calcareous cement calcite Cambrian carbonate carbonate and limonite carbonate minerals Cementing material characterized chlorite circulated clastic clay clear colour common Compactibility constituents contains corroded boundaries crystals cubic currents deposition dominant Early effects environments exposed field formed fossils Geol Geology glauconite important India indicate industries interbeddings intercalations iron oxide Jutana Dolomite KHAN Khewra Gorge laminated layers less limestone limonite maroon material is carbonate matrix medium metamorphism meters mica micaceous minerals noticed observed occurs olive origin Pakistan Peshawar pigmentation places porosity present primary pseudomorphs Punjab quartz grains recrystallized result ripple marks rocks rounded Saline Salt Range sand sandstone sector sedimentary sediments seen shale shallow slides solution strata stratification structures stylolites suggestive texture thick thin bedded Thin Section tion underlying Univ upper various vary warm writers York