The state's coastline contains many salt marshes and estuaries, as well as natural ports such as Georgetown and Charleston. An unusual feature of the coastal plain is a large number of Carolina bays, the origins of which are uncertain. One prominent, but incorrect, theory says that they were created by a meteor shower. The bays tend to be oval, lining up in a northwest to southeast orientation. The terrain is flat and the soil is composed entirely of recent sediments such as sand, silt, and clay. Areas with better drainage make excellent farmland, though some land is swampy. The natural areas of the coastal plain are part of the Middle Atlantic coastal forests ecoregion.
South Carolina is a state in the Deep South of the United States that borders Georgia to the south, North Carolina to the north, and the Atlantic Ocean to the east. Originally part of the Province of Carolina, the Province of South Carolina was one of the 13 colonies that declared independence from the British Crown during the American Revolution. The colony was originally named by King Charles II of England in honor of his father Charles I, as Carolus is Latin for Charles. South Carolina was the first state to vote to secede from the Union and was the founding state of the Confederate States of America. According to the 2010 United States Census, the state is ranked 24th among the U.S. states by population, at 4,625,384 people. South Carolina contains 46 counties and its capital is Columbia.