# Phallic Rock

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This article is about the rock in Arizona. For the rock in Mongolia, see [Kharkhorin Rock](/source/Kharkhorin_Rock).

**Phallic Rock** is a [precambrian](/source/Precambrian) [granite](/source/Granite) [rock formation](/source/Rock_formation) in [Carefree, Arizona](/source/Carefree,_Arizona), [United States](/source/United_States). The formation is caused by [spheroidal weathering](/source/Spheroidal_weathering) whereby the composition of the granite and its crystal structure facilitated the development of rounded corners and its unique [phallic](/source/Phallus) tubular shape.[1] The formation is at the eastern foot of Black Mountain and can be found approximately 400 ft (120 m) east of Tom Darlington Drive on Stagecoach Pass Road. The formation is best viewed from the western side looking east. There is a dirt pull-off on the side of Stagecoach Pass Road with enough room for several vehicles.

## References

1. [Black Mountain Conservancy Geology Article](http://www.blkmtnconservancy.org/geology2.html) [Archived](https://web.archive.org/web/20070202090031/http://www.blkmtnconservancy.org/geology2.html) 2007-02-02 at the Wayback Machine, www.blkmtnconservancy.org, ©2000 Stephanie Bradley (accessed 28 February 2007)

## Literature cited

- Esperança, S. and J. R. Holloway (1984) *Lower crustal nodules from the Camp Creek latite, Carefree, Arizona. Kimberlites II: The mantle and cryst-mantle relationships*. J. Kornprobst, [Elsevier](/source/Elsevier) II: 219–227.

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