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Alluvial plain
| Глоссарий геологических терминов |
(a) a large assemblage of fluvial landforms (braided streams, terraces, etc.,) that form low gradient, regional ramps along the flanks of mountains and extend great distances from their sources (e.g., high plains of north america. sw (b) (not recommended, use flood plain.) a general, informal term for a broad flood plain or a low-gradient delta. compare - alluvial flat. ffp. part 629 - glossary 629-6 (430-vi-nssh, 2008)
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Alluvial, английский
- A sorted or semi-sorted sediment deposited during comparatively recent geologic time by a stream or other moving body of water, and which occasionally contains concentrations of valuable minerals.
- A term commonly, although incorrectly, used by some drillers as a synonym for overburden. see overburden.
- Relating to deposits made by flowing water.
- Pertaining to material or processes associated with transportation and/or subaerial deposition by concentrated running water. compare - colluvial. gsst
- Of or pertaining to alluvium; alluvial soil.
Alluvial (proluvial) fan, английский
Alluvial clay, английский
Alluvial cone, английский
A semi-conical type of alluvial fan with very steep slopes; it is higher, narrower, and steeper (e.g., > 40% slopes) than a fan, and composed of coarser, and thicker layers of material deposited by a combination of alluvial episodes and to a much lesser degree, landslides (e.g., debris flow). coarsest materials tend to concentrate at the cone apex. compare - alluvial fan, talus cone. sw
Alluvial deposit, английский
Earth, sand, gravel, or other rock or mineral materials transported and laid down by flowing water.
Alluvial diamonds, английский
Diamonds found in association with water-laid materials.
Alluvial fan, английский
- A low, outspread mass of loose materials and/or rock material, commonly with gentle slopes, shaped like an open fan or a segment of a cone, deposited by a stream (best expressed in semiarid regions) at the place where it issues from a narrow mountain or upland valley; or where a tributary stream is near or at its junction with the main stream. it is steepest near its apex which points upstream and slopes gently and convexly outward (downstream) with a gradual decrease in gradient. gg
- A large, sloping sedimentary deposit at the mouth of a canyon, laid down by intermittently flowing water, especially in arid climates, and composed of gravel and sand. the deposit tends to be coarse and unworked, with angular, poorly sorted grains in thin, overlapping sheets. a line of fans may eventually coalesce into an apron that grows broader and higher as the slopes above are eroded away.
Alluvial flat, английский
(a) (colloquial: western u.s.a.) a nearly level, graded, alluvial surface in bolsons and semibolsons that lacks distinct channels, terraces, or flood plain levels.
Alluvial mining, английский
Alluvial ore deposit, английский
Alluvial plain remnant, английский
An erosional remnant of an alluvial plain which retains the surface form and alluvial deposits of its origin but was not emplaced by, and commonly does not grade to a present-day stream or drainage network. compare - alluvial plain, erosional remnant, paleoterrace. sw
Alluvial sand, английский
Alluvial slope, английский
Alluvial tin, английский
Alluvial values, английский
Alluvialis [e], латинский
Plain, английский
- A term used in contradistinction to mountain, though far from implying a level surface, and it may be either elevated or low.
- Простой; ясный; очевидный
- Равнина
- A general term referring to any flat, lowland area, large or small, at a low elevation. specifically, any extensive region of comparatively smooth and level gently undulating land. a plain has few or no prominent hills or valleys but sometimes has considerable slope, and usually occurs at low elevation relative to surrounding areas. where dissected, remnants of a plain can form the local uplands. a plain may be forested or bare of trees and may be formed by deposition or erosion. compare - lowland, plateau. gg
Plain (horizontal kneetype) milling machine, английский
Горизонтальный консольно-фрезерный станок
Plain -, английский
Цемент без добавок
Plain address cipher radiogram, английский
Assemblage, английский
Recommended, английский
- Refer to oxbow) an abandoned meander, commonly filled in by deposition and vegetation, but still discernable. gg
- The collection title for recommendation items that can be either based on personalization algorithm or not covered by any personalization data.
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Alluvial plain remnant, английский
An erosional remnant of an alluvial plain which retains the surface form and alluvial deposits of its origin but was not emplaced by, and commonly does not grade to a present-day stream or drainage network. compare - alluvial plain, erosional remnant, paleoterrace. sw
Alluvial flat, английский
(a) (colloquial: western u.s.a.) a nearly level, graded, alluvial surface in bolsons and semibolsons that lacks distinct channels, terraces, or flood plain levels.
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