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Limestone (calcium carbonate CaCO 3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO 3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place ...
Purbeck Marble – Fossiliferous limestone found in the Isle of Purbeck, Dorset, England (not a "true marble"; fossiliferous limestone) Sussex Marble – Limestone Pages displaying wikidata descriptions as a fallback Pages displaying short descriptions with no spaces (not a "true marble"; fossiliferous freshwater limestone)
Kakaban island is part of the Derawan Islands, East Kalimantan, Indonesia. [1] The island has an area of 774.2 hectares (1,913 acres) and is quite steep. Its limestone cliffs are covered with dense jungle right down to the water's edge. The wall drops to 180 metres (590 ft), and currents can be strong with upwelling, downcurrent and reversing ...
Travertine terraces at Mammoth Hot Springs, Yellowstone National Park, in 2016 Calcium-carbonate-encrusted, growing moss in a low-temperature freshwater travertine formation (1 euro coin for scale) Travertine (/ ˈ t r æ v ər t iː n / TRAV-ər-teen) [1] is a form of terrestrial limestone deposited around mineral springs, especially hot ...
Pages in category "Limestone formations" The following 200 pages are in this category, out of approximately 374 total. This list may not reflect recent changes .
A freshwater lens on an island. In hydrology , a lens , also called freshwater lens or Ghyben-Herzberg lens , is a convex layer of fresh groundwater that floats above the denser saltwater and is usually found on small coral or limestone islands and atolls.
Tufa columns at Mono Lake, California. Tufa is a variety of limestone formed when carbonate minerals precipitate out of water in unheated rivers or lakes. Geothermally heated hot springs sometimes produce similar (but less porous) carbonate deposits, which are known as travertine or thermogene travertine.
The tectonics processes in Indonesia formed major structures in Indonesia. The most prominent fault in the west of Indonesia is the Semangko Fault or the Great Sumatran Fault, a dextral strike-slip fault along Sumatra Island (about 1,900 km). The formation of this fault zone is related to the subduction zone in the west of Sumatra.