Earth:Tappan Spring
From HandWiki
Tappan Spring is a spring located in Tappan Spring Canyon in Coconino County, Arizona. 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.[1]
References
- ↑ Richard B. Moore, Edward W. Wolfe and George E. Ulrich (1978). "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.
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