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 also confirmed by this process. In rare cases iron oxide was
observed as an important cementing material instead of calcareous cement.
This resulted in the removal of carbonates and only clastic quartz grains were left.
Presence of clay was also confirmed by this process. In rare cases iron oxide was
observed as an important cementing material instead of calcareous cement.
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 of ...
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 of ...
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Contents
and the Baghanwala Formation | 1 |
Khewra Gorge Khewra Jehlutn District | 11 |
Mineral Poliey with special reference | 41 |
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Common terms and phrases
anhedral Baghanwala Formation basal basin biotite calcarenite calcareous cement calcilutite texture calcisiltite texture calcite Cambrian carbonate and limonite carbonate matrix carbonate minerals Cementing material characterized by calcarenite chlorite clayey cement colour Compactibility corroded boundaries cross-bedding cubic pseudomorphs deposition detrital Dolomitic limestone environments feldspar fossils freely circulated Geology of India Ghundai Sar glauconite granoblastic highly corroded indicate interbeddings intercalations iron oxide iron oxide pigmentation Jehlum KHAN Khewra Gorge Khussak Formation Khyber Agency laminated layers less corroded long shore currents marine water maroon material is carbonate metamorphism mica micaceous mineral sector Minerals are anhedral mud cracks Muscovite non-clastic observed Pakistan Peshawar PETROGRAPHY Plagioclase porosity pseudomorphs Punjab quartz quartz grains recrystallized ripple marks rock texture salt crystals Salt Range sandstone sedimentary rocks sedimentary structures sediments shale siltstone slides stable shelf area strata stratification stratigraphic stratigraphic levels stylolites texture is metamorphic thin bedded Thin Section Tobra Formation underlying Jutana Dolomite Univ upper worm burrows