Figure 5: Basin and Range: Cookes Peak, Cookes Range, and the Mimbres Valley are part of a region of north-south trending mountain ranges and valleys. Visible at right are a few of the eroded boulders of City of Rocks State Park that once erupted from calderas in the Mogollon Mountains and were broken and eroded as the Basin and Range Province formed. Photograph by Dr. Larry Crumpler, New Mexico Museum of Natural History and Science.