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How do stalagmites form?

Updated: 9/11/2023
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9y ago

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A stalactite drips water onto the floor of a limestone cave and a small source or mineral is carried with each drop. Over time as the water runs off or evaporates, the buildup of this mineral will create a stalagmite. They may take thousands of years to grow a few inches. When a stalagmite and a stalactite meet, they form a column.

Stalagmites rise from the floor of a limestone cave due to the dripping of mineralized solutions and the deposition of calcium carbonate.

The primary mineral of both stalactites and stalagmites is Calcite, the crystalline form of Calcium Carbonate that is the main ingredient of limestone. Their mode of formation is the same, precipitation of calcite; the different names reflect only their different positions. The other mineral solutions implied above, are trace metallic compounds that give the formations their colour.

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9y ago
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Q: How do stalagmites form?
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