caliche


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caliche

[kə′lē·chē]
(geology)
Conglomerate of gravel, rock, soil, or alluvium cemented with sodium salts in Chilean and Peruvian nitrate deposits; contains sodium nitrate, potassium nitrate, sodium iodate, sodium chloride, sodium sulfate, and sodium borate.
A thin layer of clayey soil capping auriferous veins (Peruvian usage).
Whitish clay in the selvage of veins (Chilean usage).
A recently discovered mineral vein.
A secondary accumulation of opaque, reddish brown to buff or white calcareous material occurring in layers on or near the surface of stony soils in arid and semiarid regions of the southwestern United States; called hardpan, calcareous duricrust, and kanker in different geographic regions. Also known as calcareous crust; croute calcaire; nari; sabach; tepetate.

caliche

Gravel, sand, or desert debris cemented by porous calcium carbonate or other salts.
References in periodicals archive ?
This unit was deposited in a semi-arid climate and is largely composed of sandstone-poor, well-drained deposits with scattered caliche nodules and thin floodplain limestones.
The 4-m width of roads was conservative based on guidelines for construction of caliche roads suggested by the New Mexico Commission of Public Records (http://www.
1 Mining and processing of caliche and repasos deposits 13 4.
Cultural insight: Carlos, from band Caliche, deputy head Miss McGrath, teaching assistant Mrs White, and Fredy from Caliche with council members from Year 1 to Year 6.
Underneath there is a highly compacted, brownish, loam to silt loam material, with coarse caliche concretions (Ensenada Formation).
The problem is exacerbated by the poor quality of colonia roads, which are often unpaved and covered with caliche (naturally occurring hardpan calcium carbonate deposits) or other materials that prevent thorough drainage.
Construction workers carved the base out of the caliche soil in West Texas and nicknamed the facility the Rattlesnake Bomber Base after its large serpentine population.
There is a small canteen and upstairs rooms in the house, which dates from 1872, have been converted to provide a base for a small but select group of artists-in-residence - Black Voices, Latin-American group Caliche, tin-pan virtuoso Jamma and Nu Century Arts, alias playwright Don Kinch and his saxophonistrapper son Soweto.
Another advantage is the layer of caliche soil under the storage area.
45The Chilean mineral caliche is the most important source of which halogen element?
argosols, semiluvisols, caliche soils, arid soils, desert soils, skeletol primitive soils, semihydromorphic soils, hydromorphic soils, saline soils, anthrosols, alpine soils, and ferralisols.
Perchlorate levels in samples of sodium nitrate fertilizer derived from Chilean caliche.