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Parabolic dune
| Глоссарий геологических терминов |
A sand dune with a long, scoop-shaped form, convex in the downwind direction so that its horns point upwind, whose ground plan, when perfectly developed, approximates the form of a parabola. gg
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Dune, английский
Dune field, английский
An assemblage of moving and/or stabilized dunes, together with sand plains, interdune areas, and the ponds, lakes, or swamps produced by the blocking of waterways by migrating dunes. see dune lake. sw & sss
Dune lake, английский
(a) a lake occupying a deflation basin as in a blowout on a dune. (b) a lake occupying a basin formed by the blocking of a stream by sand dunes migrating along a shore (e.g. moses lake, wa). gg
Dune slack, английский
A damp depression or trough between dunes in a dune field or dune ridges on a shore, caused by intersecting the capillary fringe of the local water table; a moist type of interdune. compare - interdune, dune lake. sw & gg part 629 - glossary 629-27 (430-vi-nssh, 2008)
Dune terrace, английский
Dune tracking, английский
Наблюдения за перемещением дюн
Dunedin, английский
Г. данидин (адм. центр стат. р-на отаго, о. южный, новая зеландия)
Dunemobile, английский
Автомобиль для езды по песчаным дюнам
Dunes, английский
An anglo-saxon word still in use, signifying mounds or ridges of drifted sands. (see downs.)
Dunett, английский
Parabolic, английский
Parabolic antenna, английский
Параболическая антенна
Parabolic arch, английский
- An arch whose curve is a parabola.
- An arch similar to a three-centered arch but whose intrados is parabolic, with a vertical axis.
Parabolic bowl, английский
Parabolic crown profile, английский
Параболический профиль режущей части буровой коронки
Parabolic dish, английский
A satellite antenna, usually bowl-shaped, that concentrates signals to a single focal point. see reflector.
Parabolic profile, английский
In an optical fiber, a power-law index profile with the profile parameter, g, equal to. synonym: quadratic profile.
Parabolic pulses, английский
Pulses with a parabolic intensity profile
Parabolic reflector, английский
- A reflector shape used with some focusing fixtures to provide efficient output, especially in spot setting.
- A light reflector whose surface is a paraboloid, i.e., a surface generated by rotating a parabolic section about its axis; if a small light source is placed at the focal point of the reflector, the reflected light will be concentrated in a nearly collimated beam parallel to the axis of the reflector.
Parabolic spring, английский
Leaf spring of parabolic taper profile, typically consisting of one to four leaves, and of lower stack height than an equivalent semi
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Parallel drainage pattern, английский
A drainage pattern in which the streams and their tributaries are regularly spaced and flow parallel or subparallel to one another and tributaries characteristically join the mainstream at approximately the same angle, over a considerable area. it is indicative of a region having a pronounced, uniform slope and a homogeneous lithology and rock structure, such as young coastal plains and large basalt flows. sw, gg, wa
Paleoterrace, английский
An erosional remnant of a terrace 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.
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