Caliche (ka-lee'-chee, or sometimes klee'-chee) is a sedimentary rock, a hardened natural cement of calcium carbonate that binds other materials—such as gravel, sand, clay, and silt. It occurs worldwide, in aridisol and mollisol soil orders—generally in arid or semiarid regions, including in central and western Australia, in the Kalahari Desert, in the High Plains of the western USA, in the Sonoran Desert, and in Eastern Saudi Arabia Al-Hasa. Caliche is also known as hardpan, calcrete, kankar (in India), or duricrust. The term caliche is Spanish and is originally from the Latin calx, meaning lime.
Caliche is generally light-colored, but can range from white to light pink to reddish-brown, depending on the impurities present. It generally occurs on or near the surface, but can be found in deeper subsoil deposits, as well. Layers vary from a few inches to feet thick, and multiple layers can exist in a single location.
In northern Chile and Peru, caliche also refers to mineral deposits that include nitrate salts. Caliche can also refer to various claylike deposits in Mexico and Colombia. In addition, it has been used to describe some forms of quartzite, bauxite, kaolinite, laterite, chalcedony, opal, and soda niter.
Caliche may refer to:
Mistress of ices
Stygian Skater
Scribing devices
Dancing on sabres
So very relentless
Counting the sheep
Electrical fences
American sleep
Paramorpheus
Somnambulating
Dream scarabaeus
In chorus refraining
So very relentless
Counting the sheep
Electrical fences
American sleep
One, two, fisherman's stew
Boiled on timber and stirred with a broom
Three, four, pour it on the floor
Feed all the beasties, cook up some more
Five, six, mortar and brick
Weaker than iron but stronger than sticks
Seven and eight, lock up the gate
Nothing to do but to sit and to wait
Nine, ten
Do it again
Bun in the oven
A wolf in the den
Companion chimera
Lethean grazer
Pausing to herald
Mistress of sabers
So very relentless
Counting the sheep
Electrical fences