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A cave pearl is a small, usually spherical, speleothem (cave formation) found in limestone caves. Cave pearls are formed by a concretion of calcium salts that form concentric layers around a nucleus. Exposure to moving water polishes the surface of cave pearls, making them glossy; if exposed to the air, cave pearls can degrade and appear rough.
Boxwork in Wind Cave, South Dakota. In geology, boxwork is defined as a honeycomb-like structure that can form in some fractured or jointed sedimentary rocks. If the fractures in the host rock are mineralized, they can become more resistant to weathering than the surrounding rock, and subsequent erosion can produce boxwork structures.
Sof Omar Caves is the longest cave in Ethiopia at 15.1 kilometres (9.4 mi) long. When surveyed in 1972, it was the longest cave in Africa. When surveyed in 1972, it was the longest cave in Africa. Since then explorations in Madagascar ( Marosakabe - 113km) and Algeria (Rhar Bou Ma’za - the Tafna River Cave 18.4 km) have overtaken it.
Bedrock is dissolved by carbonic acid in rainwater, groundwater, or humic acids from decaying vegetation, that seeps through bedding planes, faults, joints, and the like.. Over time, the surface terrain breaks up into clints separated by grikes and punctuated by sinkholes into which streams may disappear, crevices expand as the walls are dissolved to become caves or cave sy
The following is a list of some of the more well known caves and caverns in New Zealand.. Not all caves have an official name as set by the New Zealand Geographic Board. The national caving association maintains maps of all known surveyed caves and the name is generally allocated by the group who first discovered the cave.
This is a partial list of caves in Derbyshire, England, arranged alphabetically. [1] [2] Many lie within the Peak District National Park.[3] [4]Giant's Hole Great Masson Cavern Poole's Cavern Speedwell Cavern Cave entrance at Harboro' Rocks
Burro Flats Painted Cave, listed on the National Register of Historic Places, is located within the Santa Susana Field Laboratory boundaries, on a portion of the site owned by the U.S. government. [11] The drawings within the cave have been termed "the best preserved Indian pictograph in Southern California."
The Cave of Altamira (/ ˌ æ l t ə ˈ m ɪər ə / AL-tə-MEER-ə; Spanish: Cueva de Altamira [ˈkweβa ðe altaˈmiɾa]) is a cave complex, located near the historic town of Santillana del Mar in Cantabria, Spain.