The vast majority of North America
is on the North American Plate.
Parts of California
and western Mexico
form the partial edge of the
Plate, with the two plates meeting along the San Andreas fault
The continent can be divided into four great regions (each of which contains many sub-regions): the Great Plains
from the Gulf of Mexico to the Canadian Arctic; the geologically young, mountainous west, including the Rocky Mountains
the Great Basin, California and Alaska; the raised but relatively flat plateau of the Canadian Shield
in the northeast;
and the varied eastern region, which includes the Appalachian Mountains
, the coastal plain along the
seaboard, and the Florida peninsula. Mexico, with its long plateaus and cordilleras, falls largely in the western region,
although the eastern coastal plain does extend south along the Gulf.