Stalactites form from
A) a cave ceiling downward.
B) a cave floor upward.
C) calcium-rich water dripping down from the cave ceiling.
D) the accumulation of calcium-rich water dripping on the cave floor.
Question 2
Which of the following is not involved in cave formation in limestone?
A) mildly acidic groundwater
B) dissolution of carbonate rocks
C) land subsidence
D) a dropping water table