Stalagmite

What is the difference between a stalactite and a stalagmite?

In one place, near at hand, a stalagmite had been slowly growing up from the ground for ages, builded by the water-drip from a stalactite overhead.

In one place, near at hand, a stalagmite had been slowly growing up from the ground for ages, builded by the water-drip from a stalactite overhead.

Molten roofing north, lead dripping down south, stand like those immobilized columns of arctic water west, stalagmites, monked and housed or stamped and dudleyed east, in school texts.