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Geologic Unit: Hay Flat
Map showing publication footprint
  • Usage in publication:
    • Hay Flat limestone
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Pedregosa basin
Publication:

Stoyanow, A.A., 1937, Fossiliferous zones in the Cretaceous and Tertiary deposits of southeastern Arizona [abs.]: Geological Society of America Proceedings, 1936, p. 296-297.


Summary:

Pg. 296, 297 (table). Hay Flat limestone of Bisbee group. Consists of massive limestone. Younger than Mural limestone; older than Molly Gibson formation (new). Present in southeastern Arizona. Age is Cretaceous (Albian; Fredericksburg-Washita of Texas).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1711); supplemental information from GNC index card files (USGS-Menlo).


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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