The Atlantic Coastal Plain is the rather flat stretch of land that borders the Atlantic Ocean (including the Gulf of Mexico). It is approximately 2,200 miles long, stretching from Cape Cod, through the southeast United States and through Mexico, ending with the Yucatán Peninsula. The section from central Florida to the Yucatán Peninsula is also commonly referred to as the Gulf Coastal Plain. Gulf of Mexico in 3D perspective. ... Cape Cod and Cape Cod Bay from space. ... The Yucatán peninsula as seen from space The Yucatán Peninsula separates the Caribbean Sea from the Gulf of Mexico. ... This article or section does not cite its references or sources. ... The Yucatán peninsula as seen from space The Yucatán Peninsula separates the Caribbean Sea from the Gulf of Mexico. ... The Gulf Coastal Plain extends from the Florida Parishes of Louisiana over most of Mississippi, some of western Tennessee and Kentucky, the southwestern 2/3 of Alabama, and the western panhandle of Florida. ...

The western border of the coastal plain is defined as the fall line, to the west of which lies the Piedmont Plateau and then the Appalachian Mountains. The eastern border isn't well defined as most of the plain is at or below sea level. Some define the east border to be the coastline. Others continue the plain through the coastal shelf that extends well beyond the coastline. In geography, a coastal plain is an area of flat, low-lying land adjacent to a seacoast and separated from the interior by other features. ... The fall line has meanings in both geographical features and the sport of alpine skiing. ... The James River winds its way among piedmont hills in central Virginia. ... A rainy day in the Great Smoky Mountains, Western North Carolina Appalachia, the central and southern Appalachian Mountains of the United States, also including the Allegany and Cumberland Plateaus The Appalachian Mountains (French: les Appalaches) are a vast system of North American mountains, partly in Canada, but mostly in the... For considerations of sea level change, in particular rise associated with possible global warming, see sea level rise. ...

The geological theory is that the plain was formed as an underwater ridge when the oceans covered the entire existing plain. This theory traces the underwater ridge to the initial separation of Pangea about 280 million years ago. See the articles on Pangea and plate tectonics for more information about this geological event. Map of Pangæa Pangaea (Greek for all lands) is the name Alfred Wegener used to refer to the supercontinent that existed during the Mesozoic era, before the process of plate tectonics separated the component continents. ... Map of Pangæa Pangaea (Greek for all lands) is the name Alfred Wegener used to refer to the supercontinent that existed during the Mesozoic era, before the process of plate tectonics separated the component continents. ... Bridge across the Álfagjá rift valley in southwest Iceland, the boundary of the Eurasian and North American continental tectonic plates. ...

A separate theory includes a meteor or small asteroid impact in the Gulf of Mexico that breaks up that particular part of the plain.

The Atlantic Coastal Plain in the U.S.

Currently, the coastal plain is very wet, including many rivers, marsh, and swampland. It is primarily used for agriculture. Image File history File links AtlCoastalPlain. ... Image File history File links AtlCoastalPlain. ... Freshwater marsh in Florida In geography, a marsh is a type of wetland, featuring grasses, rushes, reeds, typhas, sedges, cat tails, and other herbaceous plants (possibly with low-growing woody plants) in a context of shallow water. ... A freshwater swamp A swamp is a wetland that features permanent inundation of large areas of land by shallow bodies of water, generally with a substantial number of hummocks, or dry-land protrusions. ...