340:
312:
254:
347:
319:
435:
In some exposures, the Dilco Coal Member is separated from the Dalton
Sandstone Member by the Mulatto Tongue of the Mancos Shale. A fourth member of the Crevasse Canyon Formation, the Borrego Pass Lentil, is found in a limited exposure area between the Dilco Coal Member and the Mulatto Tongue. The
427:
or ripple laminated." The Dalton
Sandstone Member is described as "Gray to yellowish gray, fine- to medium-grained, cliff-forming sandstone." The Gibson Coal Member is described as "Drab mudstone, buff, brown, and greenish gray sandstone (commonly
539:
In the San Juan Basin, the Gibson Coal Member and the Dilco Coal Member were exploited for coal for steam locomotives from the 1940s to the 1990s. However, they constitute less than 1% of the original coal reserves of San Juan Basin.
835:
Estrada-Ruiz, Emilio; Upchurch, Garland R.; Wheeler, Elisabeth A.; Mack, Greg H. (May 2012). "Late
Cretaceous Angiosperm Woods from the Crevasse Canyon and McRae Formations, South-Central New Mexico, USA: Part 1".
562:
1011:
311:
339:
924:"Stratigraphy of the Cretaceous rocks and the Tertiary Ojo Alamo Sandstone, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah"
202:
1006:
640:
Mack, Greg H. (1992). "Paleosols as an
Indicator of Climatic Change at the Early-Late Cretaceous Boundary, Southwestern New Mexico".
898:
692:
899:"A new species of Neurankylus (Testudines; Baenidae) from the upper Cretaceous Crevasse Canyon Formation, Southern New Mexico, USA"
557:
1001:
478:
remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific
946:
763:
432:), and coal," with the coals typically less than 0.5 m thick. Thickness is 700 feet (210 m) at the type section.
982:
790:
866:
195:
812:"Borrego Pass Lentil, a new member of the Crevasse Canyon Formation, southern San Juan basin, New Mexico"
1021:
1016:
502:
548:
The formation was originally described in 1954 by Allen and Balk as part of the
Mesaverde Group.
142:
653:
811:
8:
114:
853:
791:"Preliminary geologic map of the San Lucas Dam quadrangle, McKinley County, New Mexico"
380:
978:
764:"Mineral Resources of Fort Defiance and Tohatchi quadrangles, Arizona and New Mexico"
857:
947:"Palynology of Crevasse Canyon and Menefee Formation of San Juan basin, New Mexico"
931:
894:
845:
649:
464:
460:
452:
152:
498:
124:
508:
399:
The formation is divided into three members, in ascending stratigraphic order:
269:
609:
995:
439:
In southern New Mexico, the
Crevasse Canyon Formation contains fossil soils (
429:
424:
259:
217:
204:
64:
29:
795:
New Mexico Bureau of
Geology and Mineral Resources, Open-File Geologic Map
715:
660:
484:
39:
528:
448:
384:
377:
237:
84:
49:
922:
O'Sullivan, R.B.; Repenning, C.A.; Beaumont, E.C.; Page, H.G. (1972).
973:
Weishampel, David B.; Dodson, Peter; OsmĂłlska, Halszka, eds. (2004).
691:
Lucas, Spencer G.; Dalman, Sebastian G.; Sullivan, Robert M. (2016).
524:
520:
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977:(2nd ed.). Berkeley, Calif.: University of California Press.
459:), suggesting a shift from an arid to a humid climate across the
444:
388:
241:
94:
69:
411:. The Dilco Coal Member is described by Cather (2010) as "Drab
834:
721:
693:"Cretaceous dinosaur footprints from Sierra County, New Mexico"
563:
List of stratigraphic units with indeterminate dinosaur fossils
490:
494:
479:
519:
Tschudy (1976) identified the
Crevasse Canyon formation as
420:
373:
183:
954:
New Mexico Bureau of Mines and
Mineral Resources Circular
903:
New Mexico Museum of
Natural History and Science Bulletin
771:
New Mexico Bureau of Mines and Mineral Resources Bulletin
697:
New Mexico Museum of Natural History and Science Bulletin
972:
666:
672:
584:
582:
580:
134:
Dilco Coal, Dalton Sandstone & Gibson Coal Members
874:
New Mexico Geological Society Field Conference Series
599:
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577:
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Borrego Pass Lentil is a highly variable sandstone.
739:
727:
690:
493:turtle that is the earliest representative of its
621:
594:
346:
318:
993:
455:contains paleosols typical of an arid climate (
326:Crevasse Canyon Formation (the United States)
892:
678:
18:Geologic formation in New Mexico and Arizona
654:10.1306/D426792E-2B26-11D7-8648000102C1865D
543:
501:have been identified in the formation near
482:. The formation is the type formation for
935:
928:U.S. Geological Survey Professional Paper
761:
588:
1012:Upper Cretaceous Series of North America
558:List of dinosaur-bearing rock formations
944:
864:
838:International Journal of Plant Sciences
745:
733:
994:
867:"Coal resources of the San Juan Basin"
809:
788:
667:Weishampel, Dodson & OsmĂłlska 2004
627:
603:
354:Crevasse Canyon Formation (New Mexico)
930:. Professional Paper. 521-E: E1–E65.
534:
511:is common in the Gibson Coal Member.
642:SEPM Journal of Sedimentary Research
639:
1007:Cretaceous formations of New Mexico
13:
762:Allen, J.E.; Balk, Robert (1954).
14:
1033:
470:
345:
338:
317:
310:
252:
37:
755:
1002:Geologic formations of Arizona
684:
633:
443:) typical of a humid climate (
394:
1:
570:
329:Show map of the United States
7:
551:
10:
1038:
865:Fassett, James E. (1989).
415:, fine- to medium-grained
467:boundary in this region.
370:Crevasse Canyon Formation
304:
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24:Crevasse Canyon Formation
23:
722:Estrada-Ruiz et al. 2012
679:Lichtig & Lucas 2016
544:History of investigation
503:Elephant Butte Reservoir
423:. Sandstone is commonly
162:700 ft (210 m)
789:Cather, Steven (2010).
405:Dalton Sandstone Member
143:Point Lookout Sandstone
945:Tschudy, R.H. (1976).
816:The Mountain Geologist
616:O'Sullivan et al. 1972
514:
357:Show map of New Mexico
810:Correa, A.C. (1970).
589:Allen & Balk 1954
218:35.7916°N 108.9446°W
893:Lichtig, Asher J.;
669:, pp. 517–607.
531:of coal and shale.
214: /
30:Stratigraphic range
535:Economic resources
451:). The underlying
409:Gibson Coal Member
381:geologic formation
223:35.7916; -108.9446
895:Lucas, Spencer G.
401:Dilco Coal Member
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499:fossil trackways
465:upper Cretaceous
461:lower Cretaceous
453:Mojado Formation
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153:Gallup Sandstone
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497:. Two dinosaur
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125:Mesaverde Group
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964:11 September
962:. Retrieved
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911:. Retrieved
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882:. Retrieved
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841:
837:
824:. Retrieved
819:
815:
801:11 September
799:. Retrieved
794:
780:11 September
778:. Retrieved
774:
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756:Bibliography
746:Fassett 1989
741:
734:Tschudy 1976
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717:
705:. Retrieved
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430:cross-bedded
408:
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369:
367:
297:Year defined
276:Type section
15:
884:1 September
822:(2): 99–102
797:. OF-GM 212
707:1 September
628:Correa 1970
604:Cather 2010
485:Neurankylus
449:inceptisols
425:crossbedded
395:Description
221: /
209:108°56′41″W
196:Coordinates
996:Categories
571:References
529:palynology
385:New Mexico
378:Cretaceous
238:New Mexico
206:35°47′30″N
913:31 August
909:: 117–119
880:: 303–307
826:31 August
703:: 151–152
525:Santonian
521:Coniacian
457:aridisols
441:paleosols
417:sandstone
376:-bearing
281:Named for
176:Sandstone
167:Lithology
159:Thickness
139:Underlies
131:Sub-units
115:Formation
35:Santonian
897:(2016).
858:83998771
552:See also
476:Dinosaur
413:mudstone
289:Named by
190:Location
180:mudstone
149:Overlies
960:: 48–55
445:alfisol
389:Arizona
248:Country
242:Arizona
172:Primary
121:Unit of
101:↓
981:
856:
491:baenid
419:, and
407:, and
266:Extent
257:
234:Region
950:(PDF)
870:(PDF)
854:S2CID
767:(PDF)
495:genus
487:notos
480:genus
372:is a
979:ISBN
966:2020
915:2021
886:2021
828:2021
803:2020
782:2020
709:2021
523:and
489:, a
447:and
421:coal
387:and
374:coal
368:The
300:1954
184:coal
111:Type
40:Preęž’
958:154
932:doi
846:doi
842:173
650:doi
527:by
515:Age
383:in
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901:.
878:40
876:.
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840:.
818:.
814:.
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775:36
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769:.
701:74
699:.
695:.
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646:62
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596:^
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