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Geologic Unit: Randolph
Map showing publication footprint
  • Usage in publication:
    • Randolph limestone
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Pedregosa basin
Publication:

Blake, W.P., 1902, Tombstone and its mines; A report upon the past and present condition of the mines of Tombstone, Cochise County, Arizona, to the Development Company of America: Cheltenham Press, 82 p.


Summary:

(Tombstone and its mines). Randolph limestone (Paleozoic, probably Carboniferous). Overlies ancient sedimentary strata of limestone.

Source: US geologic names lexicon (USGS Bull. 896, p. 1770).


Map showing publication footprint
  • Usage in publication:
    • Randolph limestone
  • Modifications:
    • Revised
  • 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. Randolph limestone, 300 feet thick, underlies Ajax quartzite in Tombstone mining district, Arizona. [Is oldest formation mentioned.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1770).


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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