Select a Letter to view the associated terms.
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| Water gap
||A pass in a ridge through which a stream flows.
| Water table
||The upper surface of the zone of saturation beneath the surface. See also: aquifer.
||A term used for a drainage divide.
| Wave base
||The lower limit of wave transportation and erosion, equal to half the wavelength.
| Wave crest
||The highest part of a wave.
| Wave height
||The vertical distance between a wave crest and the preceding trough.
| Wave period
||The interval of time required for a wave crest to travel a distance equal to one wavelength; the interval of time required for two successive wave crests to pass a fixed point.
| Wave refraction
||The process by which a wave is bent or turned from its original direction. In sea waves, as a wave approaches a shore obliquely, part of it reaches the shallow water near the shore while the rest is still advancing in deeper water; the part of the wave in the shallower water moves more slowly than the part in the deeper water. In seismic waves, refraction results from the wave encountering material with a different density or composition.
| Wave trough
||The lowest part of a wave, between successive crests.
| Wave-built terrace
||A terrace built up from wave-washed sediments. Wave-built terraces usually lie seaward of a wave-cut terrace.
| Wave-cut cliff
||A cliff formed along a coast by the undercutting action of waves and currents.
| Wave-cut platform
||A terrace cut across bedrock by wave erosion. Synonymous with wave-cut terrace.
| Wave-cut terrace
||See wave-cut platform.
||The horizontal distance between similar points on two successive waves, measured perpendicular to the crest.
||to accustom a child or young animal to food other than the mother's milk (Morris 1992).
||A physical state of the atmosphere at a given time and place.
||The processes by which rocks are chemically altered or physically broken into fragments as a result of exposure to atmospheric agents and the pressures and temperatures at or near Earth's surface, with little or no transportation of the loosened or altered materials.
| Welded tuff
||A rock formed from particles of volcanic ash that were hot enough to become fused together.
| Wild Trout
||A management program which relies on the natural production potential of a stream to provide fishing opportunity for wild trout. Applied to streams with good to excellent trout habitat where consumptive fishing pressure is light to moderate.
| Wind gap
||A gap in a ridge through which a stream, now abandoned as a result of stream piracy, once flowed.
| Wind shadow
||The area behind an obstacle where air movement is not capable of moving material.
| Wrinkle ridge
||A sinuous, irregular segmented ridge on the surface of a lunar mare, believed to be a result of compression of the lava.