Merriam Cone, Arizona
Location: 35.3B, 111.3W
Elevation: 6,813 feet (2,077 m)
Merriam Cone is a cinder cone that also erupted three lava flows. One flow dammed the Little Colorado River 7.5 miles (12 km) to the northeast. The flow continued an additional 15 miles (24 km) down the canyon. This flows has been dated at 150,000 years old. This area was used to train Apollo astronauts because of the variety of volcanic landforms available. 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.
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