Melange PDF

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Författare: Dean Yeagle.

This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. In geology, a mélange is a large-scale breccia, a mappable body of rock characterized by a lack of continuous bedding and the inclusion of fragments of rock of all sizes, contained in a fine-grained deformed matrix. The mélange typically consists of a jumble of large blocks of varied lithologies. Mélange occurrences are associated with thrust faulted terranes in orogenic belts. A mélange is formed in the accretionary wedge above a subduction zone. Before the advent of plate tectonics in the early 1970s, it was difficult to explain mélanges in terms of known geological mechanisms. Cudugman Point on Bacuit Bay, and in the Cuyo Group of Islands.

It consists of a jumble of various rock types contained in a matrix of grey-green slaty mudstone and siltstone. The Eastern Desert of Egypt is part of the Neoproterozoic Arabian-Nubian Shield and displays different occurrences of Neoproterozoic ophiolitic mélanges. The term mélange in English is a loan word from French, used to mean a mixture of disparate components. 1970, Preliminary report and geologic guide to Franciscan melanges of the Morro Bay – San Simeon area, San Luis Obispo County, California: California Geological Survey Special Publication 35. 1984, Classification of melanges: Geological Society of America, Special Paper 198, p. Look up mélange in Wiktionary, the free dictionary. Sauter à la navigation Sauter à la recherche Mélanger est l’action de prendre deux composants distincts, deux phases, et de les réunir dans un récipient.