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The unit was first defined by
Connell and his collaborators in 1999 as the Cerro Conejo Member of the Zia Formation. It was named for exposures along Arroyo Ojito near Cerro Conejo, a small hill northwest of Albuquerque. Arroyo Ojito was also designated as the
507:
In 2007, Williams and Cole recommended that the Arroyo Ojito
Formation be abandoned, because the name was being used inconsistently and because the formation straddled a significant region unconformity, since named the Rincones paleosurface. They promoted the
516:. Connell responded the next year by concurring with the promotion of the Ceja Formation (which he divided into Santa Ana Mesa and Atrisco Members), promoting the Cerro Conejo to formation rank, and retaining the middle beds as the Arroyo Ojito.
512:, which lay above the Rincones paleosurface, to formation rank, and moved the remaining members of the Arroyo Ojito into an informal "Middle Red" formation, recalling the earliest subdivisions of the
500:(no type section defined). Tedford and Barghoon recommended that the Cerro Conejo Member be reassigned to the Arroyo Ojito Formation, since there was a significant
555:
295:
323:
846:
504:(corresponding to a pause in sediment deposition of 1 to 1.6 Ma) separating the Cerro Conejo from the rest of the Zia Formation.
742:"Clues from the Santa Fe Group for Oligocene-Miocene paleogeography of the southeastern Colorado Plateau near Grants,New Mexico"
208:
394:
The Cerro Conejo
Formation is composed of very light brown to pink or yellowish-red, fine- to medium-grained, well-
413:. Sandstone grains are subrounded and frosted. The formation also contains numerous white to light greenish gray
685:
769:
714:"Revisions to the stratigraphic nomenclature of the Santa Fe Group, northwestern Albuquerque basin, New Mexico"
713:
770:"Santa Fe Group (Neogene), Ceja del Rio Puerco, northwestern Albuquerque basin, Sandoval County, New Mexico"
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686:"Refinements to the stratigraphic Santa Fe Group, northwestern Albuquerque basin, New Mexico"
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at the Rincon and Zia quarries that are characteristic of the middle to late
Miocene (
399:
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beds. The total thickness is 316 meters (1,037 ft). The formation overlies the
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798:"Geologic map of the Albuquerque 30' x 60' quadrangle, north-central New Mexico"
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440:. The overall age range is constrained to between 14.8 and 9.5 Ma.
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Cerro Conejo
Formation in road cut along U.S. 550, New Mexico, USA
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Koning, Daniel J.; Heizler, Mattew; Jochems, Andrew (2020).
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463:. These beds have been assigned to the informal Benavidez
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777:
New Mexico
Geological Society Field Conference Guidebook
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New Mexico
Geological Society Field Conference Guidebook
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List of fossiliferous stratigraphic units in New Mexico
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U.S. Geological Survey
Scientific Investigations Map
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432:One of the ash beds within the formation yielded a
712:Connell, S.D.; Koning, D.J.; Cather, S.M. (1999).
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749:New Mexico Geoloical Society Special Publication
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807:. Scientific Investigations Map. SIM-2946.
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310:Cerro Conejo Formation (the United States)
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768:Tedford, R.H.; Barghoon, Steven (1999).
443:Gravel beds within the formation in the
374:Gravel beds within the formation in the
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475:The formation has yielded vertebrate
409:and include occasional thinly bedded
436:age of 13.64 +/-0.09 million years (
796:Williams, P.L.; Cole, J.C. (2007).
405:. The beds are tabular and locally
338:Cerro Conejo Formation (New Mexico)
13:
641:Koning, Heizler & Jochems 2020
18:A geologic formation in New Mexico
14:
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583:Connell, Koning & Cather 1999
847:Neogene formations of New Mexico
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1:
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313:Show map of the United States
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617:Tedford & Barghoon 1999
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451:have provided clues to the
276:Connell, Koning, and Cather
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561:Paleontology in New Mexico
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166:316 meters (1,037 ft)
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656:Williams & Cole 2007
491:History of investigation
823:2027/mdp.39015049951992
369:Albuquerque, New Mexico
684:Connell, S.D. (2008).
427:Arroyo Ojito Formation
354:Cerro Conejo Formation
341:Show map of New Mexico
147:Arroyo Ojito Formation
24:Cerro Conejo Formation
534:Earth sciences portal
224:35.4089°N 106.8338°W
548:Paleontology portal
425:with the overlying
398:, medium- to thick-
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30:Stratigraphic range
693:New Mexico Geology
365:geologic formation
229:35.4089; -106.8338
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419:Zia Formation
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826:. Retrieved
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701:. Retrieved
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668:Connell 2008
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629:Connell 2008
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600:Connell 2008
506:
502:unconformity
494:
485:Clarendonian
474:
442:
431:
423:interfingers
415:volcanic ash
393:
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362:late Miocene
353:
351:
281:Year defined
268:Cerro Conejo
260:Type section
15:
510:Ceja Member
449:Albuquerque
390:Description
227: /
215:106°50′02″W
202:Coordinates
841:Categories
759:23 October
699:(1): 14–35
678:References
481:Barstovian
445:Rio Puerco
376:Rio Puerco
244:New Mexico
212:35°24′32″N
828:11 August
787:11 August
783:: 327–336
755:: 153–166
731:11 August
727:: 337–354
703:11 August
567:Footnotes
403:sandstone
265:Named for
171:Lithology
163:Thickness
143:Underlies
127:Formation
520:See also
411:mudstone
273:Named by
196:Location
190:Mudstone
153:Overlies
477:fossils
471:Fossils
455:of the
382:of the
250:Country
176:Primary
133:Unit of
34:Miocene
465:Member
457:Grants
400:bedded
396:sorted
384:Grants
358:middle
240:Region
180:Arkose
801:(PDF)
773:(PDF)
745:(PDF)
717:(PDF)
689:(PDF)
356:is a
186:Other
830:2020
789:2020
761:2020
733:2020
705:2020
434:K-Ar
421:and
352:The
284:1999
123:Type
47:PreꞒ
819:hdl
809:doi
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648:^
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467:.
438:Ma
429:.
97:Pg
41:Ma
36:,
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602:.
585:.
102:N
92:K
87:J
82:T
77:P
72:C
67:D
62:S
57:O
52:Ꞓ
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