- Usage in publication:
-
- Canyon Lake Member
- Modifications:
-
- Named
- Geochronologic dating
- Dominant lithology:
-
- Tuff
- AAPG geologic province:
-
- Basin-and-Range province
Summary:
Named as the upper member of the newly named Superstition Tuff for exposures (the type section) at Canyon Lake, 1.0 km northwest of Tortilla Flat and 6+ mi north and slightly east of Siphon Draw, in Maricopa Co, AZ in the Basin-and-Range province. Lies within the 375 sq km interior area of the Superstition cauldron. At type, base not exposed; is overlain by rhyolite gravels and, locally, by alkali olivine basalt that are unnamed. Elsewhere, Canyon Lake is underlain and overlain by rhyolite ash flows and epiclastic breccias of Geronimo Head Formation (new). Is not in contact with the middle member (Dogie Spring Member, new) of the Superstition. Consists of quartz latite ash-flow tuff that is about 180 m thick at type. Is a simple cooling unit distinguished by nodes of plagioclase nearly equal to quartz and quartz > sanidine. F-T date on zircon of 14.9 +/-0.8 m.y. Geologic map; columnar section. Miocene age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Canyon Lake Member*
- Modifications:
-
- Adopted
- AAPG geologic province:
-
- Basin-and-Range province
Summary:
Canyon Lake Member of the Superstition Tuff is adopted. Age is Miocene.
Source: 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 ([ ]).