0 example sentences using cretaceous.
Cretaceous used in a sentence
Cretaceous definitions
noun
from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
See also: Cretaceous
adjective
abounding in chalk
adjective
of or relating to or denoting the third period of the Mesozoic era
See also: Cretaceous