stalagmite
Quick Summary
A stalagmite is a mineral formation found on the floor of a cave. It is created by the slow drip of water containing dissolved minerals, primarily calcium carbonate. As water droplets fall from the cave ceiling, they deposit tiny amounts of these minerals. Over long periods, these deposits accumulate, building up an inverted icicle-like structure that grows upward from the cave floor. Stalagmites can take on various shapes, from slender to mound-like, and are distinct from stalactites, which hang from the ceiling. The formation of speleothems like stalagmites requires a steady supply of mineral-rich water and an environment where carbon dioxide can escape from the water, allowing mineral precipitation.123
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