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National Geologic Map Database

Geologic Unit: Sappa

Usage:

Sappa Formation (IA,KS,NE*,SD)
Sappa Member of Sheridan Formation (NE)


Subunits:

FORMATION STATUS (alphabetical): Grand Island Member (NE), [†?]Pearlette Ash Member (KS,NE,SD).
MEMBER STATUS: [†?]Pearlette Ash Bed (NE).


Geologic age:

Quaternary*
Pleistocene*


Type section, locality, area and/or origin of name:

Not synopsized to date.


AAPG geologic province:

Salina basin*


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