stalagmite

A conical mineral deposit, usually calcite or aragonite, built up on the floor of a cavern, formed from the dripping of mineral-rich water.

Carbonate of lime deposited on the floor of a cavern. See stalactite.

A deposit more or less resembling an inverted stalactite, formed by calcareous water dropping on the floors of caverns; hence, a similar deposit of other material.

A mineral deposit of calcium carbonate, in shapes similar to icicles, that lie on the ground of a cave.

a cylinder of calcium carbonate projecting upward from the floor of a limestone cave