Which one of the following concerning stalactites and stalagmites is not true?
a.) Stalagmites form on the floors of caves below the water table.
b.) Stalactites are deposited from water dripping from the ceiling of an aerated cavern.
c.) Both are composed of calcium carbonate.
d.) Both are forms of dripstone; stalactites hang from the ceiling, stalagmites grow upward from the cavern floor.
Answer: a.) Stalagmites form on the floors of caves below the water table.
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