Spring in Tappan Spring Canyon, Coconino County, Arizona
Tappan Spring is a spring located in Tappan Spring Canyon in Coconino County, Arizona.[1]Basalt rocks of Tappan age are named after flows from cinder cones north of the spring. Tappan-age rocks are from the period 0.2 to 0.7 myr.[2]
^Richard B. Moore; Edward W. Wolfe; George E. Ulrich (1976). "Volcanic rocks of the eastern and northern parts of the San Francisco volcanic field, Arizona". Journal of Research of the U.S. Geological Survey. 4 (5): 549–560.