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Alluvial fans are common in the geologic record, such as in the Triassic basins of eastern North America and the New Red Sandstone of south Devon. Such fan deposits likely contain the largest accumulations of gravel in the geologic record. Alluvial fans have also been found on Mars and Titan, showing that fluvial processes have occurred on ...
File: Alluvial fan, Taklimakan Desert, XinJiang Province, China, NASA, ASTER.jpg
English: An alluvial fans of volcanic cones (notably the active Mt. Karang), near Rawa Danau, West Java, Indonesia. Related reference regarding the description of this alluvial fan : van der Kaars, Sander, et al. "Late Quaternary palaeoecology, palynology and palaeolimnology of a tropical lowland swamp: Rawa Danau, West-Java, Indonesia."
In this arid environment, alluvial fans form at the mouth of these streams. Very large alluvial fans merged to form continuous alluvial slopes called bajadas along the Panamint Range. [33] The faster uplift along the Black Mountains formed much smaller alluvial fans because older fans are buried under playa sediments before they can grow too large.
Alluvial fan – Fan-shaped deposit of sediment; Avulsion (river) – Rapid abandonment of a river channel and formation of a new channel; Estuary – Partially enclosed coastal body of brackish water; Levee – Ridge or wall to hold back water; Nile Delta – Delta produced by the Nile River at its mouth in the Mediterranean Sea; Regressive delta
The Crestone Conglomerate consists of poorly sorted fanglomerates that accumulated in prehistoric alluvial fans and related fluvial systems. Some of these rocks have hues of red and green. Conglomerate cliffs are found on the east coast of Scotland from Arbroath northwards along the coastlines of the former counties of Angus and Kincardineshire .
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An alluvial fan could have been deposited and formed outside of a mountain range, however, thrusting of the mountain belt could cause the alluvial fan to become broken up by the new mountain forming. Thus, the alluvial fan would be split with the fan on either side of the new mountain range development and could change the steepness of the fan. [1]