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Geologic Unit: Sappa
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  • Usage in publication:
    • Sappa Formation*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Salina basin
Publication: Summary:

Use of Pearlette as a member of Sappa Formation abandoned. Type Sappa in the Salina basin, NE contains only Pearlette type O, or Mesa Falls ash bed, the informally designated downwind equivalent of the Mesa Falls Tuff of the Yellowstone caldera complex.

Source: GNU records (USGS DDS-6; Denver GNULEX).

NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).

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