Rimstone vs. Stalagmite

Rimstonenoun

A secondary mineral deposit, with a stone-wall-like appearance made up of calcite and other minerals, that builds up to create cave pools.

Rimstone

Rimstone, also called gours, is a type of speleothem (cave formation) in the form of a stone dam. Rimstone is made up of calcite and other minerals that build up in cave pools.

Stalagmitenoun

(geology) A secondary mineral deposit of calcium carbonate or other mineral, in shapes similar to icicles, that lie on the ground of a cave.

Stalagmitenoun

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.

Stalagmitenoun

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

Stalagmitenoun

a mound or tapering column rising from the floor of a cave, formed of calcium salts deposited by dripping water and often uniting with a stalactite.

Stalagmite

A stalagmite (UK: , US: ; from the Greek σταλαγμίτης – stalagmitês, from σταλαγμίας – stalagmias, ) 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. Stalagmites are typically composed of calcium carbonate, but may consist of lava, mud, peat, pitch, sand, sinter and amberat (crystallized urine of pack rats).The corresponding formation hanging down from the ceiling of a cave is a stalactite.