Geological Bulletin, Volume 5University of Peshawar - Geology |
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Page 46
... mainly due to biotite but some also have other dark minerals . Sample no . 38 , although containing about 10 % muscovite and 2 to 3 % garnet , looks pure white in hand specimen . The rocks are generally medium -grained and gneissose but ...
... mainly due to biotite but some also have other dark minerals . Sample no . 38 , although containing about 10 % muscovite and 2 to 3 % garnet , looks pure white in hand specimen . The rocks are generally medium -grained and gneissose but ...
Page 58
... mainly Siluro - Devonian and , to a lesser extent , Carboniferous in age , with a relative abundance of reef complexes . Many of these rocks were intruded by various types of igneous rocks ( mainly granites ) , mostly during the Late ...
... mainly Siluro - Devonian and , to a lesser extent , Carboniferous in age , with a relative abundance of reef complexes . Many of these rocks were intruded by various types of igneous rocks ( mainly granites ) , mostly during the Late ...
Page 124
... mainly silica , however , calcite is also present . Cross - bedding is ubiquitous in the upper part . Extensive shearing , causing development of closely spaced joints and fractures , has occurred . The total thickness of the quartzite ...
... mainly silica , however , calcite is also present . Cross - bedding is ubiquitous in the upper part . Extensive shearing , causing development of closely spaced joints and fractures , has occurred . The total thickness of the quartzite ...
Contents
Vol | 1 |
Vol | 5 |
Petrography of the upper part of Kohistan and southwestern Gilgit | 27 |
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Common terms and phrases
abundant Ahmad Ali Masjid altered amphibole amphibolites Attock Attock Slates Attock-Cherat Range bands biotite Bull calcareous calcite carbonate Carboniferous Cherat chlorite colour correlated Cretaceous cross-bedding Darwazai deposits Devonian diorites dolomite epidote exposed feet thick feldspar fossils fractures garnet Geol geology Gilgit Agency gneisses grains granitic green grey Hazara District hornblende Ibid igneous India Indus River intrusions Jamrud Jan and Tahirkheli Jour Khan Khattak Khewra Formation Khwar Khyber Agency Kohat Kohistan Landikotal Slate limestone lithological Manki Slate Masjid Formation metamorphism metasedimentary miles minerals minor Mohmand Agency muscovite nala norites Nowshera occur outcrops Palaeozoic Paleocene Panjab Univ pegmatites Peshawar phyllites plagioclase pyroxene quartz quartzite reef region Rehman Ripple Marks rocks Salt Range sandstone Schistose Group schists sedimentary Shagai Shagai Limestone Shah Dheri shale Silurian Siluro-Devonian slaty shale Stauffer stratigraphic structures Surv Tertiary thin bedded Thin Section ultramafic veins weathered West Pakistan yellowish