Geological Bulletin, Volume 5University of Peshawar - Geology |
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Page 46
... porphyritic , the feldspar phenocrysts attaining a length of 0.4 " in them . Amphibolite xenoliths are common . Some of the granites are in the form of repeated injections in amphibolites and mica schists . The main granite body ...
... porphyritic , the feldspar phenocrysts attaining a length of 0.4 " in them . Amphibolite xenoliths are common . Some of the granites are in the form of repeated injections in amphibolites and mica schists . The main granite body ...
Page 135
... ( 1922 ) studied the basalts of Deccan ( India ) and found that most of these are remark- ably similar . They are mainly dense , non - porphyritic rocks with not more than ten per cent of glass . In the majority of cases 135 135-138.
... ( 1922 ) studied the basalts of Deccan ( India ) and found that most of these are remark- ably similar . They are mainly dense , non - porphyritic rocks with not more than ten per cent of glass . In the majority of cases 135 135-138.
Page 140
... porphyritic texture . The oligoclase phenocrysts make up about six to seven per cent and have an extinction angle of about , 10 ° . In both sections oligoclase is optically positive , 2V about 80 ° to 85 ° , and has a refractive index ...
... porphyritic texture . The oligoclase phenocrysts make up about six to seven per cent and have an extinction angle of about , 10 ° . In both sections oligoclase is optically positive , 2V about 80 ° to 85 ° , and has a refractive index ...
Contents
Vol | 1 |
Vol | 5 |
Petrography of the upper part of Kohistan and southwestern Gilgit | 27 |
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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