5:00 Quarry and surroundings, Cholla Power Plant: Aegean - Bithynian, Arizona
collected by T. Olsen, S. Nesbitt
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Prolacertiformes indet.
(Camp 1945)
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"a 'prolacertiform'" | ||||||||||
= Archosauromorpha indet.
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Schoch et al. 2010 | |||||||||
Vertebrata indet.
Lamarck 1801
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Coprolites | ||||||||||
Chondrichthyes
- Hybodontiformes
- Hybodontidae
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Hybodontidae indet.
(Agassiz 1834)
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Nesbitt 2000 | |||||||||
Fin spines | ||||||||||
Amphibia
- Temnospondyli
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Temnospondyli indet.
von Zittel 1887
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3 specimens | |||||||||
Three partial skulls | ||||||||||
Reptilia
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Reptilia indet.
Laurenti 1768
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"a second large reptile" and "small reptile remains" | ||||||||||
Poposauroidea informal new species
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Nesbitt 2005 | |||||||||
"Chatterjeea-like taxon", MSM P3260, ilium, sacral vertebrae | ||||||||||
Arizonasaurus babbitti
Welles 1947
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see common names |
Geography
Country: | United States | State/province: | Arizona | County: | Navajo |
Coordinates: | 34.9° North, 110.3° West (view map) | ||||
Paleocoordinates: | 3.3° North, 38.9° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
Geographic resolution: | local area |
Stratigraphy
Formation: | Moenkopi | Member: | Holbrook | ||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: "upper Holbrook Member"; Lucas & Schoch (2002: Lethaia 35: 97-106) inferred the Holbrook member to be earliest Anisian (Aegean–Bithynian) in age based upon tetrapod biostratigraphy (Eocyclotosaurus used to correlate Holbrook Member to German Upper Bundsandstein) and magnetostratigraphy |
Lithology and environment
Primary lithology: | brown conglomeratic sandstone |
Secondary lithology: | sandstone |
Includes fossils? | Y |
Lithology description: most bones collected from "a widespread channel conglomerate layer found beneath the massive sandstone. The one exception was found in the massive sandstone just above the conglomerate layer. The stratum where most of the bones were found represents a channel deposit of brownish sandstone that includes purple, green and brown clasts with small pebbles" | |
Environment: | "channel" |
Taphonomy
Modes of preservation: | body |
Degree of concentration: | concentrated |
Size of fossils: | macrofossils |
Spatial orientation: | random |
Preservation of anatomical detail: | medium |
Collection methods and comments
Collection methods: | field collection |
Reason for describing collection: | general faunal/floral analysis |
Collectors: | T. Olsen, S. Nesbitt |
Metadata
Also known as: | MSM 99-84, 98-448, Five O'Clock Quarry | ||
Database number: | 95092 | ||
Authorizer: | R. Butler | Enterer: | R. Butler |
Modifier: | R. Butler | Research group: | vertebrate |
Created: | 2010-04-06 07:30:17 | Last modified: | 2012-10-25 03:38:24 |
Access level: | the public | Released: | 2010-04-06 07:30:17 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
32378. | S. J. Nesbitt. 2005. The Moenkopi Formation along the Little Colorado River in eastern Arizona. In S. J. Nesbitt, W. G. Parker, R. B. Irmis (eds.), Guidebook to the Triassic Formations of the Colorado Plateau in northern Arizona, Mesa Southwest Museum Bulletin 9:13-23 [R. Butler/R. Butler] |
Secondary references:
32399 | S. G. Lucas and R. R. Schoch. 2002. Triassic temnospondyl biostratigraphy, biochronology and correlation of the German Bundsandstein and North American Moenkopi Formation. Lethaia 35:97-106 [R. Butler/R. Butler] | |
32434 | S. J. Nesbitt. 2000. A preliminary report on new vertebrate fossil sites, including a microsite from the Holbrook Member of the Moenkopi Formation, Holbrook, Arizona. Mesa Southwest Museum Bulletin 7:17-30 [R. Butler/R. Butler] | |
32392 | S. J. Nesbitt. 2005. A new archosaur from the upper Moenkopi Formation (Middle Triassic) of Arizona and its implications for rauisuchian phylogeny and diversification. Neues Jahrbuch für Geologie und Paläontologie Monatshefte 2005(6):332-346 [R. Butler/R. Butler] | |
32095 | R. R. Schoch, S. Nesbitt, J. Müller, S. G. Lucas, and J. A. Boy. 2010. The reptile assemblage from the Moenkopi Formation (Middle Triassic) of New Mexico. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 255:345-369 [R. Butler/R. Butler/R. Butler] |