S P Crater is a cinder cone volcano in the San Francisco volcanic field, 25 miles (40 km) north of Flagstaff, Arizona, United States.[4] It is surrounded by several other cinder cones which are older and more eroded. It is a striking feature on the local landscape, with a well-defined lava flow that extends for 4.3 miles (7 km) to the north.[5] American astronauts use the crater to train for moonwalking.[6]
^"S P Mountain". ListsOfJohn.com. Retrieved 2013-01-25.
^"S P Crater". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved 2021-06-30.
^Rittenour, T. M.; Riggs, N. R.; Kennedy, L. E. (2012-02-09). "Application of single-grain OSL to date quartz xenocrysts within a basalt flow, San Francisco volcanic field, northern Arizona, USA". Quaternary Geochronology. 10. Elsevier BV: 300–307. doi:10.1016/j.quageo.2012.02.002. Retrieved 2024-02-24.
^Priest, Susan S.; Wendell A. Duffield; Karen Malis-Clark; James W. Hendley II; et al. (2001-12-21). "The San Francisco Volcanic Field, Arizona: USGS Fact Sheet 017-01". United States Geological Survey. Retrieved 2008-09-02.
^Lopes, Rosaly (2005-02-07). The Volcano Adventure Guide. Cambridge University Press. p. 153. ISBN 978-0521554534.
^In the Arizona desert, NASA prepares for walking on the moon National Geographic, 2022-11-09.
SPCrater is a cinder cone volcano in the San Francisco volcanic field, 25 miles (40 km) north of Flagstaff, Arizona, United States. It is surrounded...
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