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The Mowry Shale or Fish-scale Beds because of the abundance of fish scales, is a dark-gray, siliceous shale that weathers silver gray; it is 10-70 m thick. 40Ar/39Ar of sanidine from a bentonite yielded an age of 97.17 +/-0.69 Ma, thus is
Cenomanian in age. Fossils indicate the Mowry was deposited
282:
Isolated, lenticular accumulations of fish bones, scales, teeth and coprolites are thought to represent storm lag deposits formed by winnowing of the seafloor and concentration of the bones in bottom scours. The following fish species have been identified from the Mowry: an unnamed caturid, an
615:
Anderson, A.D., and
Kowallis, B.J., 2005, Storm deposited fish debris in the Cretaceous Mowry Shale near Vernal, Utah. In Dehler, C.M., Pederson, J.L., Sprinkel, D.A., and Kowallis, B.J., editors, Uinta Mountain geology: Utah Geological Association Publication 33, p.
625:
Stewart, J.D. and Hakel, M., 2006. Ichthyofauna of the Mowry Shale (Early
Cenomanian) of Wyoming. In, Lucas, S.G., and Sullivan, R.M. (editors), Late Cretaceous Vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35,
566:
Obradovich, J.D., 1993, A Cretaceous time scale, IN Caldwell, W.G., and
Kauffman, E.G., eds., Evolution of the Western Interior basin: Geological Association of Canada Special Paper, 39, p. 379-396.
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Although the Mowry had been considered to be a lower
Cenomanian unit in some previous reports, recent biostratigraphic and chronostratigraphic studies now support an uppermost Albian age.
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508:"New Insights on the Sequence Stratigraphic Architecture of the Dakota Formation in Kansas–Nebraska–Iowa from a Decade of Sponsored Research Activity"
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Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The
Dinosauria, 2nd, Berkeley: University of California Press. 861 pp.
231:
In so much as the Mowry was observed to lie above formations that were originally thought to be associated with the difficult to date upper
705:
659:
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Hyatt, 1903, from the Mowry Shale (Cretaceous) of
Montana and Wyoming. U.S. Geological Survey Bulletin 1787-L, p. 1-11.
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Characteristic white or silvery colored Mowry Shale below the Mancos Shale, west of
Dinosaur National Monument.
517:(258): Palynostratigraphy and Correlation of the Dakota Formation in the Type Area, Iowa, Nebraska, and Kansas
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251:. In many locations, the Mowry is bounded above by the Clay Spur bentonite, which is assigned the
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of 97 million years, the upper Mowry may extend into the earliest
Cenomanian.
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583:. Geolex — Significant Publications. United States Geological Survey
549:. Geolex — Significant Publications. United States Geological Survey
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is the oldest acanthomorph (spiny-rayed) teleost in North
America.
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Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
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during the early stages of the Western Interior Seaway.
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showing the relationship of the Mancos and Mowry shales
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Mowry Shale exposed in a road cut, Uintah Basin, Utah.
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List of stratigraphic units with few dinosaur genera
352:. It occurs within the following geologic regions:
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328:The Mowry outcrops or occurs at depth in parts of
263:Invertebrate fossils known include the ammonites
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243:age. However, recent studies, particularly of
160:and Mowry shale oil and gas fields within the
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239:, the Mowry was previously thought to be of
506:Greg A. Ludvigson, Brian J. Witzke (2010).
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473:List of dinosaur-bearing rock formations
320:have been recovered from the formation.
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754:United States geologic formation stubs
739:Shale formations of the United States
7:
671:
669:
247:, have dated the Mowry to the late-
692:. You can help Knowledge (XXG) by
602:Kennedy, W.J., 1989. The Ammonite
515:Current Research in Earth Sciences
16:Geologic formation in Wyoming, USA
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457:
443:
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681:This article about a specific
194:. The formation was named for
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749:Cretaceous geology of Wyoming
295:sp., an unnamed alepisaurid
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688:in the United States is a
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581:National Geologic Database
577:"Geologic Unit: Newcastle"
547:National Geologic Database
316:remains diagnostic to the
273:Neogastroplites americanus
269:Metengonoceras teigenense
245:fossil pollens and spores
101:
26:
277:Neogastroplites muelleri
265:Metengonoceras aspenanum
283:unnamed ichthyodectid,
204:Johnson County, Wyoming
133:Johnson County, Wyoming
543:"Geologic Unit: Mowry"
362:Central Montana Uplift
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437:Earth sciences portal
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417:Yellowstone Province
176:Stratigraphic column
147:N. H. Darton in 1904
118:Geological formation
451:Paleontology portal
237:Newcastle Sandstone
28:Stratigraphic range
744:Cretaceous Montana
392:Powder River Basin
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377:Green River Basin
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387:North Park Basin
253:radiometric date
188:Early Cretaceous
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166:Piceance Basin
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519:. Retrieved
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402:Uinta Uplift
372:Denver Basin
367:Chadron Arch
342:South Dakota
338:North Dakota
327:
324:Distribution
312:
307:
303:
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259:Paleontology
233:Dakota units
230:
221:
196:Mowrie Creek
183:
181:
158:Mancos Shale
139:Type section
645:Mowry Shale
210:Description
184:Mowry Shale
162:Uinta Basin
22:Mowry Shale
733:Categories
626:p.161-163.
587:2021-09-11
553:2020-11-27
486:References
241:Cenomanian
686:formation
308:Xenyllion
301:Xenyllion
293:Apateodus
192:formation
190:geologic
616:125-130.
423:See also
330:Colorado
314:Dinosaur
304:zonensis
289:Enchodus
285:Clupavus
144:Named by
124:Location
350:Wyoming
334:Montana
200:Buffalo
658:
275:, and
249:Albian
186:is an
129:Region
33:Albian
511:(PDF)
318:genus
291:sp.,
287:sp.,
690:stub
656:ISBN
523:2021
348:and
346:Utah
299:and
182:The
164:and
114:Type
38:PreꞒ
227:Age
202:in
735::
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494:^
344:,
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271:,
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206:.
88:Pg
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707:v
696:.
662:.
556:.
297:,
93:N
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78:J
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