340:
312:
504:
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 Santa Fe Group. 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, divided into the Navajo Draw, Loma Barbon, and Picuda Peak Members.
117:
347:
319:
503:
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 Ceja Member, which lay above the Rincones
486:
The beds assigned to the unit were originally included in the upper part of "middle red member" of the Santa Fe
Formation by Kirk Bryan and Franklin McCann in 1937. The unit was first defined by Connell and coinvestigators in 1999, and named for exposures along Arroyo Ojito northwest of Albuquerque.
442:
The formation is divided into the Navajo Draw, Loma Barbon, and Picuda Peak Member (in ascending stratigraphic order). The Navajo Draw Member consists of pale brown to pale yellow sandstone with some conglomerate lenses and mudstone deposited by numerous southeast-flowing rivers. The unit contains a
487:
This was also designated as the type locality (no type section defined). The formation was divided into the Navajo Draw, Loma Barbon, and Ceja
Members. As originally defined, the formation included all strata in the northwest Albuquerque Basin younger than the
462:
The Loma Barbon Member is similar to the Navajo Draw, but is more poorly sorted and contains occasional mudstone beds. It contains volcanic tephra with an age of 6.8 to 7.1 Ma, identical to the
Peralta Tuff Member of the
499:
be moved to the Arroyo Ojito, since there was a significant unconformity (corresponding to a hiatus in sediment deposition of 1 to 1.6 Ma) separating the Cerro Conejo from the rest of the Zia
Formation.
478:
near Picuda Peak. This member varies from 10–50 meters (33–164 ft) in thickness. This member is coarser than the underlying Loma Barbon Member, and its contact becomes disconformable to the east.
474:. It contains beds formerly assigned to the Ceja Formation but which are now known to lie below the Rincones paleosurface, a major regional unconformity. It is named for exposures of
634:
Bryan, Kirk; McCann, Franklin T. (November 1937). "The Ceja Del Rio Puerco: A Border
Feature of the Basin and Range Province in New Mexico: I. Stratigraphy and Structure".
513:
812:
311:
339:
797:
495:
beds assigned to the (since-abandoned) Pantadeleon
Formation. Tedford and Barghoon recommended that the Cerro Conejo Member of the
802:
224:
456:
672:
728:
701:"Revisions to the stratigraphic nomenclature of the Santa Fe Group, northwestern Albuquerque basin, New Mexico"
700:
729:"Santa Fe Group (Neogene), Ceja del Rio Puerco, northwestern Albuquerque basin, Sandoval County, New Mexico"
217:
756:
518:
817:
140:
130:
380:
475:
448:
428:
424:
205:
168:
673:"Refinements to the stratigraphic Santa Fe Group, northwestern Albuquerque basin, New Mexico"
643:
467:. The similarity in age with the Navajo Draw Member suggests the two members interfinger.
8:
376:
647:
403:
The Arroyo Ojito
Formation is composed of sediments deposited from streams draining the
807:
659:
663:
464:
404:
384:
121:
Arroyo Ojito
Formation at its type location northwest of Albuquerque, New Mexico, USA
767:
651:
412:
388:
757:"Geologic map of the Albuquerque 30' x 60' quadrangle, north-central New Mexico"
439:. The total thickness of the Arroyo Ojito is nearly 500 meters (1,600 ft).
459:
valley with its base within the Navajo Draw has an Ar-Ar age of 7.1 ± 0.46 Ma.
436:
427:. The upper beds are coarse and more poorly sorted. The formation rests on the
408:
158:
791:
496:
488:
432:
269:
239:
226:
68:
26:
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30:
116:
43:
470:
The Picuda Peak Member is mostly reddish sandy conglomerate and arkosic
492:
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Navajo Draw Member, Loma Barbon Member, Picuda Peak Member
608:
736:
New Mexico Geological Society Field Conference Guidebook
708:
New Mexico Geological Society Field Conference Guidebook
586:
584:
514:
List of fossiliferous stratigraphic units in New Mexico
415:. These are mostly moderately to poorly sorted arkosic
569:
559:
557:
555:
553:
551:
764:
U.S. Geological Survey Scientific Investigations Map
581:
698:
542:
699:Connell, S.D.; Koning, D.J.; Cather, S.M. (1999).
548:
789:
726:
602:
455:), and a volcanic vent (Cerro Colorado) in the
346:
318:
754:
617:
383:. It records deposition of sediments in the
766:. Scientific Investigations Map. SIM-2946.
633:
575:
481:
326:Arroyo Ojito Formation (the United States)
115:
813:Sandstone formations of the United States
771:
727:Tedford, R.H.; Barghoon, Steven (1999).
670:
590:
563:
790:
755:Williams, P.L.; Cole, J.C. (2007).
354:Arroyo Ojito Formation (New Mexico)
13:
451:age of 8.11 ± 0.05 million years (
14:
829:
798:Neogene formations of New Mexico
345:
338:
317:
310:
41:
803:Miocene Series of North America
627:
398:
391:after full integration of the
1:
524:
329:Show map of the United States
491:as then defined, except for
7:
603:Tedford & Barghoon 1999
507:
292:Connell, Koning, and Cather
10:
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519:Paleontology in New Mexico
178:500 meters (1,600 ft)
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20:
618:Williams & Cole 2007
482:History of investigation
576:Bryan & McCann 1937
381:Albuquerque, New Mexico
671:Connell, S.D. (2008).
636:The Journal of Geology
429:Cerro Conejo Formation
370:Arroyo Ojito Formation
357:Show map of New Mexico
169:Cerro Conejo Formation
21:Arroyo Ojito Formation
240:35.4277°N 106.7858°W
648:1937JG.....45..801B
543:Connell et al. 1999
411:, and southeastern
395:through the basin.
236: /
27:Stratigraphic range
680:New Mexico Geology
377:geologic formation
245:35.4277; -106.7858
465:Bearhead Rhyolite
405:Sierra Nacimiento
385:Albuquerque Basin
366:
365:
825:
818:Fluvial deposits
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413:Colorado Plateau
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389:Rio Grande Rift
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656:10.1086/624608
642:(8): 801–828.
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437:Ceja Formation
409:San Juan Basin
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159:Ceja Formation
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141:Santa Fe Group
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497:Zia Formation
494:
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489:Zia Formation
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447:flow with an
446:
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433:unconformably
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379:exposed near
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36:8.1–6.8
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777:. Retrieved
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744:. Retrieved
739:
735:
716:. Retrieved
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707:
688:. Retrieved
683:
679:
639:
635:
628:Bibliography
598:
591:Connell 2008
571:
564:Connell 2008
502:
485:
476:conglomerate
469:
461:
441:
425:conglomerate
402:
374:late Miocene
369:
367:
297:Year defined
284:Arroyo Ojito
276:Type section
206:conglomerate
31:Late Miocene
15:
399:Description
243: /
231:106°47′09″W
218:Coordinates
792:Categories
779:August 11,
746:August 11,
718:August 11,
690:August 11,
686:(1): 14–35
525:References
493:Quaternary
457:Rio Puerco
393:Rio Grande
260:New Mexico
228:35°25′40″N
808:Tortonian
742:: 327–336
714:: 337–354
664:128563355
472:sandstone
417:sandstone
281:Named for
192:Sandstone
183:Lithology
175:Thickness
155:Underlies
147:Sub-units
131:Formation
508:See also
421:mudstone
289:Named by
212:Location
202:Mudstone
165:Overlies
644:Bibcode
431:and is
387:of the
266:Country
188:Primary
137:Unit of
105:↓
662:
445:basalt
423:, and
256:Region
760:(PDF)
732:(PDF)
704:(PDF)
676:(PDF)
660:S2CID
449:Ar-Ar
372:is a
198:Other
781:2020
748:2020
720:2020
692:2020
368:The
300:1999
127:Type
44:PreꞒ
768:doi
652:doi
794::
762:.
740:50
738:.
734:.
712:50
710:.
706:.
684:38
682:.
678:.
658:.
650:.
640:45
638:.
610:^
583:^
550:^
533:^
453:Ma
419:,
407:,
204:,
94:Pg
38:Ma
29::
783:.
770::
750:.
722:.
694:.
666:.
654::
646::
605:.
578:.
566:.
545:.
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
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