When the tiny animals that live in coral reefs die, the reefs (made of calcium carbonate) may be preserved as one type of limestone.
(the tiny animals; live; L:in coral reefs) (the tiny animals that live in coral reefs; die; ) (the reefs; made; of calcium carbonate) (the reefs (made of calcium carbonate; may be preserved; as one type of limestone; T:When the tiny animals that live in coral reefs die)
the tiny animals the tiny animals that live in coral reefs the reefs the reefs (made of calcium carbonate
live die made may be preserved
L:in coral reefs
of calcium carbonate
as one type of limestone T:When the tiny animals that live in coral reefs die