- Usage in publication:
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- Safford tuff
- Modifications:
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- Original reference
- Dominant lithology:
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- Tuff
- AAPG geologic province:
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- Basin-and-Range province
Summary:
Pg. 731-733, fig. 2, pl. 1. Safford tuff. Consists of a coarse stratified but poorly sorted volcanic breccia or tuff near Safford Peak. Farther south it is usually fine grained and well stratified to thin bedded. Its materials range from sand to boulders 3 feet in diameter. Ranges through various shades of red and brown and is chalky white where altered. Thickness at least 340 feet. Rests concordantly on Rillito andesite (new) near Safford Peak, but to the southeast rests directly on Cretaceous volcanics with marked angular unconformity and is overlain by later basalts with another angular unconformity. Age is Tertiary.
Named from exposures in cliffs near Safford Peak. Occurs throughout Tucson Mountain Range, Pima Co., southeastern AZ.
Source: US geologic names lexicon (USGS Bull. 1200, p. 3378).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).