Northwest Coastal Plain and Sierra Madre Occidental, Mexico – October 20th, 201124.2N 107.4W
The Sierra Madre Occidental is a mountain range that lies approximately 300 kilometers inland from the west coast of Mexico at its northern end but approaches to within fifty kilometers of the coast near the Cordillera Neovolcánica.
The northwest coastal plain is the name given the lowland area between the Sierra Madre Occidental and the Gulf of California.Here this area of plains appears mostly dark green in color.
Visible beyond the Sierra Madre Occidental is the Mexican altiplano, stretching from the United States border to the Cordillera Neovolcánica, occupies the vast expanse of land between the eastern and western sierra madres. Various narrow, isolated ridges cross the plateaus of the northern altiplano. Numerous depressions dot the region, the largest of which is the Bolsón de Mapimí.