106:
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307:
739:
Orth, C. J.; Gilmore, J. S.; Knight, J. D.; Pillmore, C. L.; Tschudy, R. H.; Fassett, J. E. (18 December 1981). "An
Iridium Abundance Anomaly at the Palynological Cretaceous-Tertiary Boundary in Northern New Mexico".
556:. Reserves in 1999 were estimated at 18.4 trillion cubic feet (520 billion cubic meters). Production at that time was 17.5 million cubic feet per day (500,000 cubic meters per day) from 85 wells.
625:
Pollastro, Richard M.; Pillmore, Charles L. (1987). "Mineralogy and
Petrology of the Cretaceous-Tertiary Boundary Clay Bed and Adjacent Clay-Rich Rocks, Raton Basin, New Mexico and Colorado".
856:
Berry, Keith (1 January 2020). "A Thelypteridaceous Fern from the Early
Paleocene Raton Formation, South-central Colorado, and Its Importance in Interpreting the Climate of the Region".
458:
that preferentially penetrated along coal beds and destroyed the coal. It is likely that hundreds of millions of tons of the original coal deposits were destroyed this way.
517:
characteristic of a freshwater lake or pond environment. Plant fossils suggest the formation was deposited in a tropical rain forest environment, with the presence of
595:
435:
pebbles and cobbles in a coarse-grained quartzose to arkosic sandstone matrix. The middle member is fine to coarse grained sandstone, with some
548:. These were first discovered in 1841 and mining began in 1873. Mining declined precipitously in the mid-20th century with the decline of the
909:
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924:
299:
327:
479:
929:
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791:
Farley
Fleming, R. (June 1989). "Fossil Scenedesmus (Chlorococcales) from the Raton Formation, Colorado and New Mexico, U.S.A.".
210:
404:(usually at the base). It is about 1,140 feet (350 m) thick at the type locality. The formation unconformably overlies the
716:
Flores, R.M.; Bader, L.R. (1999). "A summary of
Tertiary coal resources of the Raton basin, Colorado and New Mexico".
423:
The formation can be divided into three informal members. The lowest member is a basal sandstone and conglomerate of
111:
443:, and coal. The upper member is coal-bearing and contains sandstone, siltstone, mudstone, shale, and mineable coal.
684:
467:
203:
914:
565:
105:
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685:"Lexicon of rock-stratigraphic units in Union, Colfax, Mora, and eastern Taos Counties, New Mexico"
491:
130:
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450:, ranging in age from 6.7 to 29.5 million years old, are found in the formation. These range from
409:
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8:
596:"Geology and Paleontology of the Raton Mesa and Other Regions in Colorado and New Mexico"
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Because the Raton
Formation is a well-preserved sequence of rocks spanning the
455:
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654:"Geology and coal deposits of the Raton coal field, Colfax County, New Mexico"
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clay layer which has been found to contain anomalously high concentrations of
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820:"Icacinaceae in the Early Middle Paleocene Raton Formation, Colorado"
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The Raton
Formation was originally named "Raton Hills Group" by
544:
The Raton
Formation contains economically important deposits of
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using the coal, but the formation is now being developed for
428:
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191:
545:
528:
389:
187:
490:. The boundary clay layer is accessible to the public at
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572:. In 1913, W.T. Lee changed the name to Raton Formation.
624:
901:
461:
482:. The boundary is represented by a 1-cm thick
16:A geologic formation in New Mexico and Colorado
790:
568:in 1869 for coal beds in the Raton Hills in
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715:
639:10.1306/212F8B61-2B24-11D7-8648000102C1865D
559:
682:
589:
587:
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454:and that have locally altered the coal to
104:
718:U.S. Geological Survey Professional Paper
600:U.S. Geological Survey Professional Paper
494:, among other places in the Raton Basin.
651:
470:, it has been studied for evidence of a
692:New Mexico Geological Society Guidebook
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334:
306:
902:
502:The formation contains fossils of the
408:, and unconformably (?) underlies the
855:
817:
793:Review of Palaeobotany and Palynology
539:
480:Cretaceous–Paleogene extinction event
910:Maastrichtian Stage of North America
627:SEPM Journal of Sedimentary Research
536:indicating a very warm environment.
920:Cretaceous formations of New Mexico
593:
478:that is thought to have caused the
314:Raton Formation (the United States)
13:
925:Paleogene formations of New Mexico
14:
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930:Geologic formations of Colorado
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1:
762:10.1126/science.214.4527.1341
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468:Cretaceous-Paleogene boundary
462:Cretaceous-Paleogene boundary
360:is a geological formation of
317:Show map of the United States
112:Cretaceous–Paleogene boundary
805:10.1016/0034-6667(89)90002-X
720:. 1625-A. Chapter SR: SR-2.
342:Raton Formation (New Mexico)
7:
10:
946:
566:Ferdinand Vandeveer Hayden
497:
388:The formation consists of
368:age which outcrops in the
35:upper Cretaceous–Paleocene
683:MacLachlan, M.E. (1976).
570:Colfax County, New Mexico
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836:10.31582/rmag.mg.55.2.75
560:History of investigation
492:Trinidad Lake State Park
116:Trinidad Lake State Park
891:Flores & Bader 1999
870:10.31582/rmag.mg.57.1.5
594:Lee, Willis T. (1917).
410:Poison Canyon Formation
160:1,140 feet (350 m)
141:Poison Canyon Formation
893:, p. SR-1, 14-15.
858:The Mountain Geologist
824:The Mountain Geologist
652:Pillmore, C.L (1969).
345:Show map of New Mexico
818:Berry, Keith (2018).
754:1981Sci...214.1341O
748:(4527): 1341–1343.
472:large meteor impact
222: /
30:Stratigraphic range
915:Paleogene Colorado
658:Mountain Geologist
540:Economic resources
474:at the end of the
448:igneous intrusions
392:with carbonaceous
120:Trinidad, Colorado
406:Vermejo Formation
354:
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151:Vermejo Formation
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362:Upper Cretaceous
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226:36.96°N 104.47°W
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830:(2): 75–86.
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799:(1–4): 1–6.
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699:. Retrieved
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608:. Retrieved
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531:
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512:
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445:
422:
402:conglomerate
387:
357:
355:
285:Year defined
262:Type section
178:conglomerate
18:
864:(1): 5–20.
514:Scenedesmus
504:green algae
412:. It is of
384:Description
370:Raton Basin
280:F.V. Hayden
229: /
204:Coordinates
904:Categories
701:5 November
668:5 November
610:5 November
576:References
533:Cyclosorus
526:understory
508:Pediastrum
476:Cretaceous
374:New Mexico
271:Raton Mesa
246:New Mexico
878:216446403
446:Numerous
437:siltstone
425:quartzite
418:Paleocene
398:sandstone
366:Paleocene
267:Named for
174:Sandstone
165:Lithology
157:Thickness
137:Underlies
131:Formation
770:17812258
524:and the
484:tonstein
441:mudstone
378:Colorado
277:Named by
217:104°28′W
198:Location
147:Overlies
841:15 July
778:9994340
750:Bibcode
742:Science
606:: 55–61
522:corruga
498:Fossils
488:iridium
252:Country
214:36°58′N
170:Primary
118:, near
876:
776:
768:
433:gneiss
400:, and
242:Region
874:S2CID
774:S2CID
688:(PDF)
664:: 129
456:sills
452:dikes
429:chert
420:age.
394:shale
192:shale
184:Other
843:2021
766:PMID
703:2020
670:2020
612:2020
546:coal
529:fern
511:and
431:and
390:coal
364:and
356:The
288:1869
188:Coal
127:Type
110:The
40:Preęž’
866:doi
832:doi
801:doi
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
