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Geologic Unit: Ajax
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Map showing publication footprint
  • Usage in publication:
    • Ajax quartzite
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Pedregosa basin
Publication:

Church, J.A., 1903, The Tombstone, Arizona, mining district: American Institute of Mining and Metallurgical Engineers Transactions, New York and Philadelphia meeting, February and May, 1902, v. 33, p. 3-37.


Summary:

Pg. 3-37. Ajax quartzite. 500 feet thick, overlies[?] Randolph limestone and underlies Emerald limestone. [Age is Middle Cambrian.]
[Recognized in Tombstone district, southeastern AZ.]

Source: US geologic names lexicon (USGS Bull. 896, p. 20).


Map showing publication footprint
  • Usage in publication:
    • "Ajax" quartzite†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Pedregosa basin
Publication:

Jones, E.L., and Ransome, F.L., 1920, Deposits of manganese ore in Arizona, IN Contributions to economic geology, 1919; Part 1, Metals and nonmetals except fuels: U.S. Geological Survey Bulletin, 710-D, p. D93-D184.


Summary:

(Credited to F.L. Ransome.) "Ajax" quartzite of Church is Bolsa quartzite.

Source: US geologic names lexicon (USGS Bull. 896, p. 20).


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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