Sandstones and Conglomerates in Ohio
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Lithofacies and Sedimentary Environments of Aghajari Formation in Dehsheikh Mountain, West of Shiraz, Iran
Aghajari Formation, known as Upper Fars Group, is developed throughout the Folded Zagros Zone and has a thickness of 2966 m in its type section in SW of Iran and 1473 m in the study area, located 20 km west of Shiraz. Aghajari Formation, in this area, consists of three major facies associations. These are "fine", "medium" and "coarse" grained terrigenous sediments, usually interpreted as channe...
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Seven hundred and nineteen samples from throughout the Cainozoic section in CRP-3 were analysed by a Malvern Mastersizer laser particle analyser, in order to derive a stratigraphic distribution of grain-size parameters downhole. Entropy analysis of these data (using the method of Woolfe & Michibayashi, 1995) allowed recognition of four groups of samples, each group characterised by a distinctiv...
متن کاملThe relevance of the sedimentary history of the Grand Conglomerat 1 Formation ( Central Africa ) to the interpretation of the climate 2 during a major Cryogenian glacial event
8 The Cryogenian Grand Conglomerat Formation (<765 & >735 Ma) is an 9 association of interbedded glaciogenic, clastic periglacial and non-glacial deposits, 10 topped by the Kakontwe Limestone cap carbonate. These units occur within the 11 Nguba Group of the Katanga Supergroup, deformed in the Pan African Lufilian 12 Arc that separates the Congo and Kalahari cratons. Correlation of regional 13 u...
متن کاملU.S. Geological Survey Circular 946, p. 29-33. 6. MASSIVE MUDSTONES IN BASIN ANALYSIS AND PALEOCLIMATIC INTERPRETATION OF THE NEWARK
Massive red or gray mudstones make up much of the fine-grained sedimentary rocks of the Newark Supergroup. In fact, the upper third of most sedimentary cycles in the fine-grained facies of most Newark basins is massive mudstone (division 3 of Olsen, 1984). Massive mudstones have not, however, been studied or described nearly as fully as conglomerates, sandstones, and laminated shales. This lack...
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This article lists a number of geological data on the conditions of formation of some major gold deposits in the conglomerates of the Earth's crust. We analyze the metallogenic, tectonic, stratigraphic and other factors controlling the formation of gold-bearing conglomerates in certain fields, such as the Witwatersrand (S. Africa) and Darwaz (Tajikistan). The following tectonic factors play the...
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