Here's a breakdown:
* Stalactites: These formations hang from the ceiling of a cave, resembling icicles. They are formed when water containing dissolved minerals drips from the ceiling and evaporates, leaving behind a mineral deposit.
* Stalagmites: These formations rise from the floor of a cave, often directly below stalactites. They are formed when water drips from the ceiling onto the floor and evaporates, leaving behind a mineral deposit.
Over time, stalactites and stalagmites can grow and eventually meet, forming a column.
It's important to remember that both stalactites and stalagmites are formed from water containing dissolved minerals. The difference is simply where the water drips and evaporates.