Which of the following features is NOT formed by precipitation of calcite from water?

A) travertine
B) stalagmite
C) stalactite
D) sinkhole
E) flowstone

Calcite

A common crystalline form of natural calcium carbonate, CaCO3, that is the primary constituent of limestone and marble.

Precipitation

Any kind of water, be it liquid or frozen, that drops from the sky to the ground, covering all forms such as rain, snow, sleet, and hail.

Sinkhole

A depression or hole in the ground caused by the collapse of a surface layer, often due to the dissolution of underlying limestone.