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 thrust of additional work will have the immediate goal of assigning continuity and grade to the lithium bearing pegmatites, and will likely take the form of stripping - washing outcrop areas, followed by channel sampling and bulk sampling.
Soil sampling will be trialled in areas of no outcrop to assist in the definition of drilling targets.
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.
OUT OF THIS WORLD: The Mars outcrops scientists say point to ancient lakes
The Telluride Zone was discovered in outcrop at 2600 meters (8500 feet) elevation on the northwest ridge of Mount Cairnes, approximately 4.
While Shefsky credits his exploration team for the success they have enjoyed, he also says luck plays a big hand in finding a diamond-bearing outcrop so close to the highway.
During future field research in the area, Wegweiser plans to look for more outcrops of ash so she can better determine the extent of the fire.
Strongly fractured rock exposed in small pits and outcrops within the geochemical anomaly assay from the 10 ppb detection limit to 2220 ppb gold.
Vail says one reason for publishing theMarch SCIENCE paper, and for his recent move from Exxon to Rice University in Houston, is to develop a data base that is in the public domain: The new sea level charts of the last 250 million years are based on marine outcrops around the world, which anyone can examine.
Erosion has produced topographic relief with some vein outcrops more than 200 meters above the valley base with areas of quartz stock-work veinlets and broad argillic alteration suggesting open pit potential.
Prospecting, till sampling and reconnaissance stream sediment sampling have resulted in the discovery of eight kimberlites in outcrop and an additional five areas with kimberlite rubble in glacial till where bedrock sources have not yet been found.
The assays announced represented four grab samples from small outcrops in the mineralized area.