outcrop


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outcrop

part of a rock formation or mineral vein that appears at the surface of the earth

Outcrop

 

exposed bedrock at the earth’s surface. Outcrops are generally found along riverbanks, along the slopes of ravines, and on the crests of ridges. Natural outcrops are formed by the action of natural agents, for example running water, glaciers, and wind. Artificial outcrops are either specially created or result from mine work entailing excavations and the construction of ditches, wells, prospect holes, shaft mines, and adits. The study of outcrops makes it possible to elucidate the geological structure of a locality and is widely used in geological surveying.

outcrop

[′au̇t‚kräp]
(geology)
Exposed stratum or body of ore at the surface of the earth. Also known as cropout.

outcrop

That portion of a rock formation or stratum that breaks the surface of the ground.
References in periodicals archive ?
The purpose of the program was to evaluate historical references to pegmatite outcrops on the Blue Sky Jackpot Lithium Property and to take samples to establish if the referenced pegmatites are lithium bearing.
Curiosity has completed a reconnaissance "walkabout" of the first outcrop it reached at the base of "Mount Sharp" in 2013.
Outcrop throughout the project area is rare and occurs mostly as limonitic laterite duricrust; a total of 154 sample analyses have been received, 9% of samples contain greater than 40%Fe with a maximum value of 65.
It is likely that other burrows or ichnological structures formed by vertebrates exist in eastern Texas but have been unrecognized or unobserved due to limited outcrop area and exposure.
SOAKER--Part of a rock outcrop lining the inner wall of Eagle crater, the landing site of the Opportunity rover at Meridiani Planum.
Disappointingly, none of these sections use real outcrop photos, measured sections or well log cross sections to demonstrate principles or techniques.
A sheltered entrance to the court is created that enhances its semi-private nature, but the court is connected to the whole site by a reticulated paving pattern that reflects the browns and pinks of the earth of the Australian deserts, out of which, metaphorically, the angular geological outcrop emerges so surprisingly in the middle of the city.
The massive sulphide zone outcrops for about 200 meter along strike, and disappears in both directions beneath overburden and snowfields.
Hynek of the University of Colorado in Boulder then compared infrared and visible-light images of those rocks with images of light-toned outcrops extending hundreds of kilometers to the north, east, and west.
The outcrops at their Cristal occurrence are stripped of vegetation by exploration crews, and coated with xenoliths, rock fragments encased in volcanic breccias pushed upward from deep inside the mantle.
Over the past 5 years, surface and underground rock sampling and mapping, a partial extraction soil geochemical survey and detailed Three Dimensional Induced Polarization (3D IP) geophysics with ground magnetics have led to the definition of several outstanding exploration drill targets on the property, some of which are defined by outcrops of gold and silver mineralization.
The rover's magnifying lens shows that rocks in the outcrop contain fine, rippled layers that are at various angles rather than in orderly, parallel rows.