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1983
Alluvial fans are conical, lobate, or arcuate accumulations of predominantly coarse-grained clastics extending from a mountain front or escarpment across an adjacent lowland. They represent the coarsest, most poorly sorted, proximal unit in the range of subaerial depositional systems, and commonly merge downdip into finer grained, lower gradient ...
W. E. Galloway, D. K. Hobday
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Alluvial fans are conical, lobate, or arcuate accumulations of predominantly coarse-grained clastics extending from a mountain front or escarpment across an adjacent lowland. They represent the coarsest, most poorly sorted, proximal unit in the range of subaerial depositional systems, and commonly merge downdip into finer grained, lower gradient ...
W. E. Galloway, D. K. Hobday
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Modern Alluvial Fans and Fan Deltas
1985Abstract Alluvial fans constitute a distinct landform and depositional system characteristic of piedrrnt areas. Fisher and Brown (1972) describe alluvial fans as cone-shaped piles of sediment built where streams issue from a highland into an adjacent lowland.
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Ancient Alluvial Fans and Fan Deltas
1985Abstract Although much has been learned about modern alluvial-fan and fluvial systems, the step from active systems to their ancient geologic counterparts is a big one. The following notes attempt, by means of selected examples, to illustrate the facies characteristics of a broad spectrum of fluvial and fan deposits.
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Calculation of the volume of an alluvial fan
Journal of the International Association for Mathematical Geology, 1985Calculation of the volume of a lithostratigraphic unit within an alluvial fan allows a longterm denudation rate to be calculated for the fan's catchment, where sediment is not transported beyond the fan. The calculation of denudation rates in this case depends upon accurate estimates of the volume of sediment in a lithostratigraphic unit of known age ...
P. M. Nanninga, R. J. Wasson
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Modelling alluvial fan morphology
Earth Surface Processes and Landforms, 1999A mathematical model which estimates the scale-independent sediment surface profile of alluvial fans has been developed. This model utilizes a diffusive sediment transport model and an unsteady, radial flow, conservation relationship. These equations are approximately solved assuming a quasi-steady-state closure with appropriate modelling assumptions ...
Lawrence J. De Chant +2 more
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2018
The age of a fan surface marks the end of the merging of lobes as part of the depositional fan buildup and the approximate time that elapsed since the start of trenching and abandonment of the fan surface. A wide scatter of ages over one fan results from the time needed to gradually tie lobes together into one alluvial fan unit.
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The age of a fan surface marks the end of the merging of lobes as part of the depositional fan buildup and the approximate time that elapsed since the start of trenching and abandonment of the fan surface. A wide scatter of ages over one fan results from the time needed to gradually tie lobes together into one alluvial fan unit.
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A note on the formation of alluvial fans
New Zealand Journal of Geology and Geophysics, 1966Abstract In the area along the northern flank of the Mount Hutt Range, Canterbury, deposition of alluvial fans is initiated in three ways: the sudden release of large quantities of sediment from nthe stream headwaters, the truncation of earlier formed fans, and erosion at the fan apex in the course of the normal cycle of erosion.
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Alluvial Fan Depositional System
2018Alluvial fans are developed at valley exits. They are formed mainly by the current scour of temporary flood and are characterized by a limited scope, shape similar to a conical piedmont, and coarse fragmented debris. They scatter radially from the valley entry to the basin, and the plane form of an alluvial fan appears similar to a cone or a fan.
Xinghe Yu, Shengli Li, Shunli Li
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