- Usage in publication:
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- Cienda limestone [unranked]
- Modifications:
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- Original reference
- Biostratigraphic dating
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Pedregosa basin
Summary:
Pg. 12, 36 (table 6). Cienda limestone in Pacheta member of Lowell formation. Division 9c, minutely clastic argillaceous limestone with glauconite in matrix and numerous larger inclusions of broken shell and chert. Weathers into round-edged slabs. Very rich in silicified ammonites, notably KAZANSKYELLA ARIZONICA, gen. and sp. nov., and SINZOWIELLA SPATHI, gen. and sp. nov. Thickness 4 feet. Underlies Black Knob dolomite (new); overlies Tusonimo limestone (new). Age is Early Cretaceous (Aptian); PARAHOPLITES MELCHIORIS standard ammonite zone.
[Occurs in the Ninety One Hills area, local name for unnamed hills in secs. 14 and 23, T. 24 S., R. 24 E., immediately north of International border in vicinity of International Monument No. 91, southeast of Bisbee Junction on Southern Pacific RR, Bisbee15-min quadrangle, Cochise Co., southeastern AZ. Area includes type locality and standard section of Lowell Formation.]
Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 801).
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 ([ ]).