Geological Bulletin, Volume 5University of Peshawar - Geology |
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Page 20
... plagioclase and augitic pyroxene with accessory iron ore , although alteration in many of them has produced various new minerals . The rocks in thin sections usually display ophitic to sub - ophitic texture . Alteration has proceeded to ...
... plagioclase and augitic pyroxene with accessory iron ore , although alteration in many of them has produced various new minerals . The rocks in thin sections usually display ophitic to sub - ophitic texture . Alteration has proceeded to ...
Page 34
... Plagioclase ( andesine ) may be fresh or altered ; some is completely masked by clayey and / or saussuritic matter . In one case , only the cores are altered . Section no . 5 has two types of plagioclase . The larger grains are very ...
... Plagioclase ( andesine ) may be fresh or altered ; some is completely masked by clayey and / or saussuritic matter . In one case , only the cores are altered . Section no . 5 has two types of plagioclase . The larger grains are very ...
Page 42
... plagioclase may be kaolinized as in no . 16. Section 20 was cut along the contact of a vein and norite . The former is composed of abundant epidote and chlorite , plagoi- clase ( ? secondary ) and minor iron oxide . Epidote is more ...
... plagioclase may be kaolinized as in no . 16. Section 20 was cut along the contact of a vein and norite . The former is composed of abundant epidote and chlorite , plagoi- clase ( ? secondary ) and minor iron oxide . Epidote is more ...
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