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Carbonic acid dissolves limestone by turning the mostly insoluble calcium carbonate into soluble calcium bicarbonate. The dissolution hollows out areas the the rock, creating caves. When one of these caves collapses a sinkhole will form above.
Precipitated as stalactites, stalagmites etc - and it is the primary constituent of the limestone in which the vast majority of caves form!
Thunderstorms are more likely to form in areas that have large water bodies like the seas and lakes. Places that experience the convectional rainfall is the place that will experience thunderstorms on a regular basis.
Caves caused by volcanic activity are made of basalt Caves caused by dissolution due to groundwater are formed in limestone or sometimes marble. Caves also form in glacial ice due to melting. (Glacial ice can technically be considered rock.)
because if they were made of soap they'd dissolve
Ogres are mythical creatures that are typically depicted as living in remote, secluded areas such as caves, forests, or mountains. In folklore and fairy tales, ogres are often portrayed as being solitary beings who prefer to live away from human settlements.
Within caves in carbonate rocks.
caves
Basaltic, low viscosity lava would form lava tube caves.
Caves usually form in areas with limestone or other soluble rocks that can be dissolved by water over long periods of time. Common locations for cave formation include regions with karst topography, such as in limestone landscapes or near volcanic activity, where lava tubes can create caves.
Ocean trenches form at areas of subduction.
how do caves form
Sea caves form by ocean waves pounding at the base of seashore cliffs.
Limestone caves are common because limestone is a soluble rock that dissolves easily in water. Over time, groundwater flowing through cracks in the limestone gradually enlarges these passages to form caves. Additionally, limestone is often found in areas with karst topography, characterized by sinkholes, underground rivers, and other features that promote the formation of caves.
in caves
in caves
Stalac"tites", top, or on the roof of the cave. Stalagmites form on the floor of caves.