World Library  
Flag as Inappropriate
Email this Article

SP Crater

Article Id: WHEBN0022060372
Reproduction Date:

Title: SP Crater  
Author: World Heritage Encyclopedia
Language: English
Subject: San Francisco volcanic field, List of volcanoes in the United States
Publisher: World Heritage Encyclopedia

SP Crater

S P Mountain
Elevation 7,021 ft (2,140 m) NGVD 29[1]
Location Coconino County, Arizona, U.S.
Range San Francisco volcanic field

35°34′56″N 111°37′46″W / 35.5822254°N 111.6293206°W / 35.5822254; -111.6293206Coordinates: 35°34′56″N 111°37′46″W / 35.5822254°N 111.6293206°W / 35.5822254; -111.6293206[2]

Type Cinder cone
Age of rock Approx. 71,000 yr [unreliable date]

S P Crater is a cinder cone volcano in the San Francisco volcanic field, 25 miles (40 km) north of Flagstaff, Arizona.[3] 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 7 kilometers (4.3 mi) to the north.[4]


The naming of the mountain is a bit of lore from the Old West. S P Crater can be climbed, and the lava flow can be viewed from the crater rim. C. J. Babbit, an 1880s rancher and early landowner of the mountain, expressed his opinion that the mountain resembled a pot of excrement (Shit Pot),[5] and this became the accepted local name.[4] When viewed from certain angles on the ground, the combination of the smooth round shape of the cone, the dark lava spatter on the rim, and the long dark lava flow extruding from the base do indeed resemble a toilet catastrophe. Mapmakers refused to spell out the full name, and the mountain has been shown on maps and other literature with the abbreviated name. [6]


S P Crater is a 820 foot high cinder cone of basaltic andesite. The cone is capped by an agglutinate rim that helps to protect its structure. A lava flow extends to the north of the cone for ~7 km and originated from the same vent.[7] Some workers consider the lava flow to have slightly predated the cinder cone because of geochemical data that suggests the flow is more silica rich than the cinders and based on the observation that the cone overlaps the lava flow and shows no sign of deformation.[7] However, there is some debate about the relationship between the cone and flow as it is not uncommon to form cinder cones during the early phase of an eruption as a magma degasses, and then to have lava push through the side of a cone during a late phase of eruption.

K/Ar dates on the lava are ~ 70 ka,[8] but are considered unreliable because of excess Ar[9] and the un-weathered young appearance of the cone.


External links

  • (photo gallery)
  • (maps and imagery)

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.