It is believed that during tha late cretaceouse period sea levels rose drastically resulting in about a thirdbof earths present land masses being underwater. which of the following types of evidence supports this theory? a. minerals and oil founds in undergrouns deposit. b. corals and marine fossils found in the great plains. c. volcanoes and igneous rock found on the ocean floor. d.dinosaur and bird fossils found in swamp areas.