<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (November 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (November 2012) (Learn how and when to remove this template message) </Td> </Tr> <P> The Interior Plains is a vast physiographic region that spreads across the Laurentian craton of central North America . The region extends from the Gulf Coast region to the Arctic Ocean along the east flank of the Rocky Mountains . In Canada the region separates the Rocky Mountains from the Canadian Shield . In the United States the plains include the Great Plains of the west and the Tallgrass prairie region to the south of the Great Lakes extending east to the Appalachian Plateau region . </P>

Major bodies of water in the interior plains region