A coastal plain is an area of flat, low-lying land adjacent to a seacoast and separated from the interior by other features. One of the world's longest coastal plains is located in eastern South America. The southeastern coastal plain of North America is notable for its species diversity. The Gulf Coastal Plain of North America extends northwards from the Gulf of Mexico along the Lower Mississippi River to the Ohio River, which is a distance of about 500 miles (about 800 km). During the Cretaceous period, the central area of the United States was covered by a shallow sea, which disappeared as the land rose. Large fossilized aquatic birds called Hesperornis and Ichthyornis, found in western Kansas, indicate that the shallow sea was rife with fish.
Famous quotes containing the word plain:
“This was the merriest old man that we had ever seen, and one of the best preserved. His style of conversation was coarse and plain enough to have suited Rabelais. He would have made a good Panurge. Or rather he was a sober Silenus, and we were the boys Chromis and Mnasilus, who listened to his story.... There was a strange mingling of past and present in his conversation, for he had lived under King George, and might have remembered when Napoleon and the moderns generally were born.”
—Henry David Thoreau (1817–1862)