Petrography of late Jurassic—late cretaceous rocks from Koranga Valley, Raukumara Peninsula
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منابع مشابه
The study of petrography and mineral chemistry in aplite-pegmatites from Simin valley (south of Hamedan)
Aplitic and pegmatitic dykes exposed in southeast of Hamedan in the Simin area. From the margin to the center of these dykes, two typical textural areas present that obviously indicate effect of crystallization progress: 1- In the marginal zone, fabrics consist of anisotropic textures of the outer zones, including fine-grained units, graphic intergrowths, and unidirectional solidification text...
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New simplified tectonic models and depositional history of Late Cretaceous rocks are established in a part of Zagros Orogenic Belt that is located in the Northeastern Iraq. These rocks constutes the most important Cretaceous oil reservoir in the Middle East. The dependent tools are petrography, field study and the concept of drowning phases. This concept is relatively new and accurate in explan...
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S. ANANTHARAMAN, G. P. WILSON, D. C. DAS SARMA, W. A. CLEMENS, Palaeontology Division, Geological Survey of India, Hyderabad, 500-068 India, [email protected]; Corresponding author, Department of Earth Sciences, Denver Museum of Nature & Science, 2001 Colorado Boulevard., Denver, Colorado 80205-5798 U.S.A., [email protected]; Museum of Paleontology and Department of Integrative Biology, ...
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Petrography and physicomechanical properties of alkali granites, alkali quartz syenite, and nepheline syenite from Ambela, NW Pakistan, have been investigated. Whereas the alkali quartz syenite and most of the alkali granites are megaporphyritic, the nepheline syenite and some of the alkali granites are microporphyritic. Their phenocryst shape and size and abundance of groundmass are also diffe...
متن کاملLate Cretaceous Echinoids from the Seymareh member (Lopha Limestone member), KabirKuh Anticline, Southwest of Iran
In the present study, Kabir kuh Section, related to the Seymareh or Lopha Limestone member (Gurpi Formation) have been Selected. The member has yielded a rich echinoid fauna and 21 species of Echinoid belonging to 14 genera are recognized and described. The Kabir Kuh section yielded two regular echinoid taxa: Salenia nutrix and Goniopygus superbus, one holectypoid taxa: Coptodiscus noemiae, two...
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ژورنال
عنوان ژورنال: New Zealand Journal of Geology and Geophysics
سال: 1978
ISSN: 0028-8306,1175-8791
DOI: 10.1080/00288306.1978.10424050