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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...

Boneyard Boxwork Others Cave popcorn, also known as "coralloids" or "cave coral", are small, knobby clusters of calcite Cave pearls are the result of water...

caves: caves are rare across most of the world; most caves are dark, cold, and damp; and other cave inhabitants, such as bears and cave bears, cave lions...

Australia, a pearling town Cave pearl La Pelegrina pearl Les pêcheurs de perles, The Pearl Fishers, an opera by Georges Bizet Oriental Pride Pearl Maxima,...

A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and...

A show cave—also called tourist cave, public cave, and, in the United States, commercial cave—is a cave which has been made accessible to the public for...

(from Ancient Greek σπήλαιον (spḗlaion) 'cave', and -λογία (-logía) 'study of') is the scientific study of caves and other karst features, as well as their...

solutional cave, solution cave, or karst cave is a cave usually formed in the soluble rock limestone. It is the most frequently occurring type of cave. It can...

archaeology, cave paintings are a type of parietal art (which category also includes petroglyphs, or engravings), found on the wall or ceilings of caves. The...

exploring wild cave systems (as distinguished from show caves). In contrast, speleology is the scientific study of caves and the cave environment. The...

A sea cave, also known as a littoral cave, is a type of cave formed primarily by the wave action of the sea. The primary process involved is erosion. Sea...

of cave curtains, flowstones, cave pearls and scallops. The interiors would have been damp and wet when the caves were being formed. The Batu cave system...

An ice cave is any type of natural cave (most commonly lava tubes or limestone caves) that contains significant amounts of perennial (year-round) ice...

A cave-in is a collapse of a geologic formation, mine or structure which may occur during mining, tunneling, or steep-walled excavation such as trenching...

a member of') is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings...

A pit cave, shaft cave or vertical cave—or often simply called a pit (in the US) and pothole or pot (in the UK); jama in Slavic languages scientific and...

to estavelles. Morphologically, ponors come in forms of large pits and caves, large fissures and caverns, networks of smaller cracks, and sedimentary...

water flows down the walls or along the floors of a cave. They are typically found in "solution caves", in limestone, where they are the most common speleothem...

longest cave by country List of deepest caves Show cave Speleology World's Deepest Caves World's Longest Caves "List of Long Underwater Caves in Quintana...

development. Bluff Dweller's Cave (1927) - McDonald County Bridal Cave (1948) - Camden County Crevice Cave - Perry County Crystal Cave (1893) Current River Cavern...