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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 ...
Flowstones are sheetlike deposits of calcite or other carbonate minerals, formed where water flows down the walls or along the floors of a cave. [1] They are typically found in "solution caves", in limestone, where they are the most common speleothem. However, they may form in any type of cave where water enters that has picked up dissolved ...
Speleogenesis is the origin and development of caves, the primary process that determines essential features of the hydrogeology of karst and guides its evolution. It often deals with the development of caves through limestone, caused by the presence of water with carbon dioxide dissolved within it, producing carbonic acid which permits the dissociation of the calcium carbonate in the limestone.
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 Podpeč Limestone (also known as Predole Beds) is a geological formation of Pliensbachian-Earliest Toarcian (Early Jurassic) age in southern and southwestern Slovenia, including South-West of Ljubljana or nearby Mount Krim, with other isolated locations such as in the Julian Alps.
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 .
Wave ripple or symmetric ripple, from Permian rocks in Nomgon, Mongolia.Note "decapatation" of ripple crests due to change in current. In sedimentology, wave-formed ripples or wave-formed ripple marks are a feature of sediments (sandstones, limestones, siltstones) and dunes.
Malham Cove is a large curved limestone formation 0.6 miles (1 km) north of the village of Malham, North Yorkshire, England.It was formed by a waterfall carrying meltwater from glaciers at the end of the last Ice Age more than 12,000 years ago.