- Usage in publication:
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- Yankee Joe formation
- Modifications:
-
- Named
- Dominant lithology:
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- Argillite
- Graywacke
- Arkose
- AAPG geologic province:
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- Basin-and-Range province
Summary:
Sequence of older Precambrian volcanic and sedimentary rocks more than 15,000 feet thick occurs in Blackjack Mountains and White Ledges, 20 miles north of Globe, Arizona. This sequence consists of (older to younger); Redmond formation (acidic volcanic rocks) and Hess Canyon group (clastic sedimentary rocks). Hess Canyon is subdivided into: White Ledges formation, Yankee Joe formation, and Blackjack formation. Yankee Joe formation consists of argillaceous strata with some interbedded graywacke and arkoses. Intruded by Ruin Granite.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Yankee Joe Formation
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Basin-and-Range province
Summary:
Shown on geologic sketch map of Corral Canyon area. Divided into lower (200 to 600 feet thick), middle (500 to 1000 feet thick), and upper (350 to 1500 feet thick) members. Lower member is brown and maroon mudstone with basal arkose and graywacke. Middle member is tan and white mudstone with silty shale. Upper member is brown slate with arkose grading upward to quartzitic arkose. Yankee Joe Formation is marked slope former and shows distinctive passive folding. Age is Middle Proterozoic (indicated on geological column of Salt River Canyon).
Source: Modified from GNU records (USGS DDS-6; Menlo GNULEX).
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 ([ ]).