Definitions for "Alluvial fan"
Related Terms:
Terrace, Gully, Bajada, Chute, Pediment, Ravine, Undercutting, Canyon, Playa, Gully erosion, Badlands, Bolson, Gulch, Hanging valley, Headward erosion, Rille, Rip-rap, Natural levee, Gorge, Levee, Scabland, Couloir, Swale, Point bar, Alluvial soil, Rill erosion, Terracing, Delta , Coulee, Rill, Bluff, Bank, Wash, Fan, Arroyo, Draw, Dune , Landform, Pothole, Rip rap, Knickpoint, Scree, Peneplain, Scour, Ledge, Berm, Talus, Sinkhole, Sinkholes, Graded stream
A triangular deposit of sediment left by a stream that has lost velocity upon entering a broad, relatively flat valley.
(3) a low, outspread, relatively flat to gently sloping mass of loose rock material deposited by a stream where it flows from a narrow mountain valley onto a plain or broad valley.
The mass of sediment deposited in a cone shape where a stream widens or there is a sharp decrease in gradient.
an outspread, gently-sloping mass of detritus deposited by moving water where there is an abrupt change in gradient from steep to gentle, as from mountain gorge to valley floor.
A sloping, fan shaped mass of sediment deposited by a stream where it emerges from a nupland onto a plain.
A gently sloping apron of sediment dropped by an ephemeral stream at the base of a mountain in arid or semi-arid regions.
A low, cone-shaped deposit of terrigenous sediment formed where a stream undergoes an abrupt widening as it leaves a mountain front for an open valley.
Area where steep mountain drainages empty into valley floors, usually in arid regions. Flooding in these areas often exhibits characteristics different from flooding in riverine or coastal areas.
A fan-shaped wedge of sediment that typically accumulates on land where a stream emerges from a steep canyon onto a flat area. In map view it has the shape of an open fan. Typically forms in arid or semiarid climates.
Fan shaped alluvial deposit of sediment where streams disperse after leaving confined valleys. Steepness (gradient) relates to sediment grain size.
a fan-shaped deposit of alluvium found where a stream flows out of a mountain stream onto flat terrain at the base of a mountain
a fan shaped deposit of sediment and organic debris that forms where a stream flows, or has flowed, out of a mountainous upland onto a level plain or valley floor
a large fan-shaped pile of alluvium, deposited by a combination of stream and landslide processes
a sedimentary deposit located a topographic break such as the base of a mountain front, escarpment, or valley side, that is composed of streamflow and/or debris flow sediments and which has the shape of a fan, either fully or partially extended
A fan-shaped, gently sloping deposit of sediment left by a stream where it issues from a mountain valley onto a broad, relatively flat plain or valley. Alluvial fans are common in semiarid regions.
a sloping fan-shaped deposit of sediment located where a mountain stream meets the level land
The fan-shaped area built up by alluvial deposits, usually at the foot of a steep slope as it opens onto a valley floor or plain.
Loose sediment deposited by a mountain stream as it spreads from the base of the mountain over the valley floor.
a fan-shaped body of deposited material typically built where a stream leaves a steep mountain valley.
a generally cone-shaped deposit of sediments (mud, sand, gravel) formed by streams flowing from mountains onto a level plain
A fan-shaped deposit of sediment built by a stream, where it emerges from an upland or a mountain range into a broad valley or plain. Alluvial fans are common in arid or semiarid climates but not restricted to them.
A fan-shaped pile of sediment that forms where a rapidly flowing mountain stream enters a relatively flat valley. As water slows down, it deposits sediment (alluvium) that gradually builds a fan. more details...
Wedge-shaped sedimentary deposits formed when a steam exits a steep mountain canyon and deposits its load on the flat valley floor. (Image)
Alluvial Fan - A low, outspread, relatively flat to gently sloping mass of loose rock material, shaped like an open fan or segment of a flattish cone, deposited by a stream at a place where it issues from a narrow valley onto a plain.
A cone shaped accumulation of sediment formed by fluvial deposition just beyond the mount of a canyon; usually forms along fault block mountain escarpments where the decrease in fluvial channel slope from the canyon onto the adjacent plain facilitates deposition;
the fan-shaped deposit of alluvium left by a stream where it issues from a canyon onto a plain.
A large, fan-shaped deposit of materials carried by water and created at the spot where a stream emerges from a steeper, narrower valley onto a wider, flatter area.
A wedge-shaped collection of alluvium deposited at the mouth of a ravine, stream, or river.
Topographic feature. A sloping mass of alluvium deposited by a stream, particularly in an arid or semiarid region where a stream issues from a narrow canyon onto a plain or valley floor. An example of a particularly steep alluvial fan from Death Valley can be seen here.
A body of unconsolidated clastic material and debris flow, conical in shape, forming at the point where a stream emerges from a narrow valley onto a broader, less sloping valley floor.
n. A fan-shaped deposit of sand, mud, etc. formed by a stream where its velocity has slowed, such as at the mouth of a ravine or at the foot of a mountain.
a fan-shaped deposit of sand, mud or other materials.
A fan-shaped deposit of unsorted stream sand and gravel located where an ephemeral stream issues from a relatively steep mountain valley on to a relatively flat plain.
lowland loose sediment deposited by water run-off -usually forms at the base of mountains in arid and semi-arid environments.
(1) A fan-shaped deposit of generally coarse material created where a stream flows out onto a gentle plain; a geomorphologic feature characterized by a cone or fan-shaped deposit of clay, silt, sand, gravel, and boulders that have been eroded from mountain slopes, transported by flood flows, and deposited on the valley floor. (2) A geomorphologic feature characterized by a cone or fan-shaped deposit of boulders, gravel, and fine sediments that have been eroded from mountain slopes, transported by flood flows, and then deposited on the valley floors, and which is subject to flash flooding, high velocity flows, debris flows, erosion, sediment movement and deposition, and channel migration. (3) (Montane) A semiconical, or fan-shaped constructional, major landform that is built of more-or-less stratified alluvium with or without debris flow deposits, that occurs on the upper margin of a piedmont slope, and that has its apex at a point source of alluvium debauching from a mountain valley into an inter-montane basis. Also, a generic term for like forms in various other landscapes.
Landform. A fan-shaped deposit of alluvium on a hillside below the mouth of a mountain canyon where the alluvium spreads out across the hillside and down to the valley floor. Alluvial fans form the hillside below the steep sides of a mountain and above the valley bottom.
A large, fan-shaped pile of sediment forming at the base of narrow canyons onto a flat plain at the foot of a mountain range.
A fan-shaped deposit of alluvium typically built where a stream leaves a steep mountain valley and runs out onto a level plain.
Large fan shaped terrestrial deposit of alluvial sediment on which a braided stream flows over. Form as stream load is deposited because of a reduction in the velocity of stream flow.
an outspread, gently sloping mass of alluvium deposited by a stream, especially in an arid or semiarid region where a stream issues from a narrow canyon onto a plain or valley floor. Viewed from above, it has the shape of an open fan, the apex being at the valley mouth. AGI
Usually seen at a junction where a small stream joins a larger one or at the point where water flows through a narrow gorge that opens onto a plain, this fan-shaped deposit of soil is left behind.
A fanlike deposit of sediment that forms where an intermittent, yet rapidly flowing canyon or mountain stream spills out onto a plain or relatively flat valley.
An alluvial fan is a fan-shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain.