Crater 160, Arizona
Location: 35.5N, 111.6
Elevation: 6,232 feet (1,900 m)
Crater 160 is a composite cinder, tuff, and spatter cone. The cone is noted for the presence of ultramafic xenoliths. The cone has a three stage history. The initial eruption produced a build up of spatter on lava flows that are exposed in the bottom of the cone and in a dike-like freature in the northeast wall of the crater. During the second stage the crater was deepened and widened and layers of tuff were deposited. The tuff contains the xenoliths. The final eruption was a fire fountain that produced the cinder cone. The cone is 100 feet (35 m) tall. Photo by Steve Mattox, 1989.
Sources of Information:
Ulrich, G.E., and others, Excursion 5A: Miocene to Holocene volcanism and tectonism of the southern Colorado Plateau, Arizona, in Chapin, C.E., and Zidek, J., eds., Field excursions to volcanic terranes in the western United States, Volume 1: Southern Rocky Mountain region: New Mexico Bureau of Mines & Mineral Resources, p. 1-41.