- Usage in publication:
-
- Hoyt Canyon Formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Limestone
- Mudstone
- Siltstone
- AAPG geologic province:
-
- Great Basin province
Summary:
Pg. 2. Hoyt Canyon Formation. Consists mostly of thin-bedded, black, alternating micritic limestone and slaty silty mudstone, siltstone, and minor sandstone. Thickness is 500 m. Conformably overlies Bernice Formation (new); conformably underlies Mud Springs Canyon Formation (new). Age is Late Triassic.
[Type locality not designated.] Probably named from exposures in Hoyt Canyon, in secs. 10 and 11, T. 22 N., R. 37 E., Clan Alpine Mountains, Churchill Co., west-central NV.
Source: GNU records (USGS DDS-6; Menlo GNULEX); US geologic names lexicon (USGS Bull. 1564, p. 77-78).
- Usage in publication:
-
- Hoyt Canyon Formation
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Great Basin province
Summary:
Included in Clan Alpine sequence. Stratigraphic section gives detailed lithology and thickness of 850 m. Limestones of unit are chiefly micritic with benthonic, planktonic, and nektonic fauna. Highest terrigenous unit of Hoyt Canyon Formation contains abundance of ungraded, current laminated fine-grained sandstone, suggesting change in site of deposition. Underlies Mud Springs Canyon Formation; overlies Bernice Formation (both of Clan Alpine sequence). Age is Late Triassic (late Norian RHABDOCERAS SUESSI Zone of Silberling and Tozer, 1968).
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 ([ ]).