- Usage in publication:
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- Canyon basalt
- Modifications:
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- Named
- Dominant lithology:
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- Basalt
- AAPG geologic province:
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- Yellowstone province
Summary:
Name applied to a columnar basalt widely distributed in Yellowstone Canyon, northern part of Yellowstone National Park, WY, Yellowstone province. Source of name not specifically stated [though probably is Yellowstone Canyon]. No type locality designated. Is 150 to 200 ft thick. The lower 8 to 10 ft has columns 2 to 4 ft thick; the remainder has columns 4 to 6 in thick. Composed of olivine basalt with titaniferous augite. Is characterized by lack of alteration and deformation. The thick columns are coarse grained; the thin columns are fine grained. Is associated with gravels near Overhanging Cliff about 150 ft thick. Stratigraphically is older and younger than some unnamed rhyolites. Of Miocene-Pliocene age. Geologic map.
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).