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Geologic Unit: Midway Hill
Map showing publication footprint
  • Usage in publication:
    • Midway Hill basalt
  • Modifications:
    • First used
  • Dominant lithology:
    • Basalt
  • AAPG geologic province:
    • Yellowstone province
Publication:

Howard, A.D., 1937, History of the Grand Canyon of the Yellowstone: Geological Society of America Special Paper, 6, 159 p.


Summary:

Referred to as Midway Hill basalt because of its position between Overhanging Cliff and the basalt butte at Rainy Lake, Yellowstone National Park, WY, Yellowstone province. Intent to establish as a formal name not clearly stated. No type locality designated. Not established as a map unit except for location above. The lower 8 to 10 ft has thick columns. The remainder has thin columns. Gravel underlies the thick columns. Lithologic description omitted. Is one of the Canyon basalts. Of Miocene-Pliocene age. [Not adequately described.] 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 ([ ]).

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