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A mineral deposit, such as a stalagmite or stalactite, formed in a cave from the dripping of mineral-rich water.

[Latin spēlaeum, spēlēum, cave (from Greek spēlaion) + Greek thema, thing put down, deposit (from tithenai, to put; see dhē- in Indo-European roots).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.




(Geological Science) a natural structure within a cave
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Exploring this cave involves climbing, crawling, sliding, wiggling and squeezing through water-worn passages past ancient cave formations and bones.
of clear water ponds and wonderful cave formations, but to go down
One of the curious questions about caves is how cave formations occur?
Set against a backdrop of splendid terrain and the coastal ambiance of the Mediterranean, SEA CAVES RESIDENCES are adjacent to the remarkable sea cave formations near Coral Bay.
Nearby recreation includes boating and water sports at beautiful Bear Lake, camping, canoeing in the Cutler Westlands Maze and exploring natural cave formations in the half-mile tour through Minnetonka Cave.
"In order to give the restaurant the look and feel of an actual cave, experienced engineers explored the cave formations
"In order to give the restaurant the look and feel of an actual cave, experienced engineers explored the cave formations in different parts of the world, including the popular Al Hoota Caves in the Sultanate.
For their latest study, they swabbed stalactites and other cave formations for DNA analysis.
The author also visits natural wonders such as the singing sands of California's Kelso Dunes and the Stalacpipe Organ of Virginia's Luray Caverns, where cave formations are tapped like a huge xylophone to make musical tones.
Mineral deposits in water dripping from the roof of the limestone cave splashed onto the cave floor, and mist from those drip water impacts formed delicate rosette-looking speleothems (cave formations) that the divers called 'florets.' It turned out the average of the tooth data also converged to the age obtained from the mineral deposit data.
A hundred years ago, tourists traveled to venture underground and view cave formations, baby steps into ecotourism.