2018 Map of Merriam Crater

About this map

Coconino National Forest encompasses this volcanic landscape dominated by a concentration of cinder cones and geological formations. The topography is defined by significant landmarks such as Merriam Mtn and Merriam Crater, which rise prominently above the surrounding plains. The distribution of these features, including The Sproul, North Sheba Crater, and South Sheba Crater, illustrates the complex volcanic history of this portion of Arizona. Drainage in the southern half is dictated by the meandering path of San Francisco Wash. While human infrastructure is limited to rural routes like Grandfalls Rd and Walking Cane Ranch Rd, the map provides a clear look at the relationship between these volcanic vents, such as Maroon Crater and Francis Crater, and the high-desert terrain within the national forest boundaries.