Downs Quarry, MNA 207-10: Norian, Arizona
collected by L. Jacobs, P. Murray
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Cionichthyes sp.
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Tannenbaum 1983 | |||||||||
Branchiopoda
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? Branchiopoda indet.
Latreille 1817
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Osteichthyes
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Osteichthyes informal indet. C
Huxley 1880
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Tannenbaum 1983 | 1 element | ||||||||
Osteichthyes informal indet. D
Huxley 1880
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Tannenbaum 1983 | 2 elements | ||||||||
Osteichthyes informal indet. G
Huxley 1880
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Tannenbaum 1983 | 1 element | ||||||||
Osteichthyes informal indet. L
Huxley 1880
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Tannenbaum 1983 | 1 element | ||||||||
Osteichthyes informal indet. N
Huxley 1880
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Tannenbaum 1983 | 1 element | ||||||||
? Osteichthyes informal indet. R
Huxley 1880
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Tannenbaum 1983 | 1 element | ||||||||
"fish?" | ||||||||||
? Osteichthyes informal indet. Z
Huxley 1880
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Tannenbaum 1983 | 1 element | ||||||||
"fish?" | ||||||||||
Coelacanthimorpha
- Coelacanthiformes
- Coelacanthidae
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Coelacanthidae indet.
Agassiz 1843
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Tannenbaum 1983 | 1 element | ||||||||
Dipnoi
- Ceratodontidae
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Ceratodus sp.
Agassiz 1838
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Cynodontia
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Cynodontia indet.
Owen 1861
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Tannenbaum 1983 | 1 specimen | ||||||||
Reptilia
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Reptilia indet.
Laurenti 1768
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Tannenbaum 1983 | 6 specimens | ||||||||
Parrishia mccreai
Long and Murry 1995
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Long and Murry 1995 | 8 elements | ||||||||
nomen dubium belonging to Archosauria | ||||||||||
MNA Pl. 2708, 3081, 3125, cervical centra. MNA Pl. 3071, 3073, 3079, dorsal centra. MNA Pl. 2445, posterior dorsal. MNA Pl. 2746, sacral | ||||||||||
Reptilia
- Parasuchidae
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Leptosuchus sp.
Case 1922
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Long and Murry 1995 | 38 specimens | ||||||||
MNA V3732, Pl. 2731, 3072, V3736, V3733, V3726, Pl. 3062, Pl. 3069, Pl. 2738, Pl. 2741, V3734, Pl. 3055, Pl. 3056, V3665, Pl. 2736, Pl. 3088, Pl. 2680, V3601, Pl. 3054, Pl. 3057, Pl. 3070, V3727, Pl. 3059, V3667, Pl. 3087, 3097, 2730, 3086, 3063, 3064, 3058, 2740, 3060, 3103, 3085, 3093, 3080, 2742 | ||||||||||
Rauisuchidae indet.
Huene 1942
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1 individual | |||||||||
= Leptosuchus adamanensis
Camp 1930
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Long and Murry 1995 | |||||||||
recombined as Smilosuchus adamanensis | ||||||||||
MNA Pl. 2675, braincase. MNA V3698, left squamosal. MNA V3739, quadrate, paroccipital process. MNA V3737, snout | ||||||||||
Phytosaurus sp.
Jaeger 1828
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= Paleorhinus sp.
Williston 1904
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Long and Murry 1995 | |||||||||
synonym of Parasuchus | ||||||||||
MNA V3728, portion of snout | ||||||||||
Reptilia
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Poposaurus gracilis
Mehl 1915
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3 specimens | |||||||||
MNA Pl. 3077, sacrum. MNA V3715, dorsal centrum. MNA Pl. 2694, proximal femur | ||||||||||
Postosuchus kirkpatricki
Chatterjee 1985
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Long and Murry 1995 | 1 element | ||||||||
MNA V3740, distal right humerus | ||||||||||
Hesperosuchus agilis
Colbert 1952
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1 element | |||||||||
MNA Pl. 3102, radius | ||||||||||
Desmatosuchus sp.
Case 1920
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4 specimens | |||||||||
= Desmatosuchus haplocerus
Cope 1892
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Long and Murry 1995 | |||||||||
nomen dubium belonging to Aetosauria | ||||||||||
?MNA PL. 2710, 3096, 3110, 3127, cervical vertebra and plates | ||||||||||
Stagonolepis wellesi
(Long and Ballew 1985)
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Long and Murry 1995 | 16 specimens | ||||||||
original and current combination Calyptosuchus wellesi | ||||||||||
MNA Pl. 2665, 2729, 3090, 3092, 3094, 3091, 2676, 2666, 2667, 2668, 3117, 3129, 2744, 3100, 3101, V3744, postcranial specimens | ||||||||||
Acaenasuchus geoffreyi
Long and Murry 1995
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Long and Murry 1995 | 5 specimens | ||||||||
MNA V3714, Pl. 3066, 3050, 3067, 3113, plates | ||||||||||
Tecovasuchus chatterjeei
Martz and Small 2006
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Heckert et al. 2007 | 1 specimen | ||||||||
MNA 3202, osteoderms | ||||||||||
Reptilia
- Fabrosauridae
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Fabrosauridae indet.
Galton 1972
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Reptilia
- Tanystropheidae
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Tanytrachelos sp.
Olsen 1979
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1 specimen | |||||||||
Amphibia
- Temnospondyli
- Metoposauridae
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Metoposaurus sp.
Lydekker 1890
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= Buettneria perfecta
Case 1922
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Long and Murry 1995 | |||||||||
synonym of Anaschisma browni | ||||||||||
MNA Pl. 2683, 2697, dermal bone fragments. MNA Pl. 2864, plate. MNA V3675, vertebral centrum | ||||||||||
Placerias gigas
Camp and Welles 1956
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= Buettneria perfecta
Case 1922
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Long and Murry 1995 | |||||||||
synonym of Anaschisma browni | ||||||||||
MNA Pl. 2732, vertebrae | ||||||||||
Actinopteri
- Perleidiformes
- Colobodontidae
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? Colobodontidae indet.
Stensiö 1916
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Actinopteri
- Semionotiformes
- Semionotidae
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Semionotidae indet.
Woodward 1890
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Palaeonisciformes
- Palaeoniscidae
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Palaeoniscidae indet.
Vogt 1852
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Tannenbaum 1983 | |||||||||
cf. Turseodus sp.
Leidy 1857
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Tannenbaum 1983 | |||||||||
Palaeonisciformes
- Redfieldiidae
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Redfieldiidae indet.
Hutchinson 1973
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Tannenbaum 1983 | |||||||||
Lasalichthyes sp. or Synorichthyes sp. (ref 10591) | ||||||||||
Pholidopleuriformes
- Pholidopleuridae
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cf. Australosomus sp.
Pivetau 1930
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Tannenbaum 1983 | 2 elements | ||||||||
Chondrichthyes
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Chondrichthyes informal A
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Tannenbaum 1983 | 1 element | ||||||||
Chondrichthyes
- Xenacanthiformes
- Xenacanthidae
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Xenacanthus moorei
(Woodward 1889)
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11 elements | |||||||||
recombined as Triodus moorei | ||||||||||
unclassified
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Plantae indet.
Haeckel 1866
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see common names |
Geography
Country: | United States | State/province: | Arizona | County: | Apache |
Coordinates: | 34.4° North, 109.5° West (view map) | ||||
Paleocoordinates: | 10.1° North, 48.1° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | outcrop |
Time
Period: | Triassic | Epoch: | Late/Upper Triassic |
Stage: | Norian | 10 m.y. bin: | Triassic 4 |
Key time interval: | Norian | ||
Age range of interval: | 227.00000 - 208.50000 m.y. ago | ||
Age estimate: | 213.44 ± 5.16 to 209.95 ± 0.44 Ma (paleomagnetic) |
Stratigraphy
Formation: | Chinle | Member: | Petrified Forest | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: 3 m above upper level in the Placerias Quarry; also placed in the Petrified Forest Mb of the Chinle Fm. Also referred to the Bluewater Creek Formation
Kent et al. Petrified Forest Member of the Chinle formation falls between magneto zones PF4n and PF2n (roughly 209.95–213.44Ma) |
Lithology and environment
Primary lithology: | concretionary "carbonate" |
Includes fossils? | Y |
Lithology description: Many bones "are encased in gray carbonate concretions which have an odor of hydrogen sulfide when broken." | |
Environment: | pond |
Geology comments: "low-energy depositional environments", like the Placerias Quarry (i.e. pond or marsh) |
Taphonomy
Modes of preservation: | body,concretion,coprolite |
Degree of concentration: | concentrated |
Size of fossils: | macrofossils,mesofossils,microfossils |
Preservation of anatomical detail: | excellent |
Articulated whole bodies: | none |
Associated major elements: | none |
Disassociated major elements: | many |
Disassociated minor elements: | many |
Fragmentation: | frequent |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection excludes: | some microfossils |
Collection methods: | bulk,sieve,field collection |
Rock censused: | 5800 kg |
Reason for describing collection: | general faunal/floral analysis |
Collectors: | L. Jacobs, P. Murray |
Metadata
Database number: | 39219 | ||
Authorizer: | M. Carrano, R. Butler | Enterer: | M. Carrano, R. Butler |
Modifier: | G. Varnham | Research group: | vertebrate |
Created: | 2004-05-24 11:12:03 | Last modified: | 2022-01-21 10:07:09 |
Access level: | the public | Released: | 2004-05-24 11:12:03 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
10591. | L. L. Jacobs and P. A. Murry. 1980. The vertebrate community of the Triassic Chinle Formation near St. Johns, Arizona. Aspects of Vertebrate History: Essays in Honor of Edwin Harris Colbert, L. L. Jacobs (ed.), Museum of Northern Arizona Press 55-71 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
19347 | ETE | A. R. Fiorillo, K. Padian, and C. Musikasinthorn. 2000. Taphonomy and depositional setting of the Placerias Quarry (Chinle Formation: Late Triassic, Arizona). Palaios 15:373-386 [M. Carrano/M. Carrano] |
31129 | A. B. Heckert and S. G. Lucas. 2002. Acaenasuchus geoffreyi (Archosauria: Aetosauria) from the Upper Triassic Chinle Group: juvenile of Desmatosuchus haplocerus. In A. B. Heckert, S. G. Lucas (eds.), Upper Triassic Stratigraphy and Paleontology. New Mexico Museum of Natural History and Science Bulletin 21:205-214 [R. Butler/R. Butler] | |
24941 | ETE | A. B. Heckert and S. G. Lucas. 2006. Micro- and small vertebrate biostratigraphy and biochronology of the Upper Triassic Chinle Group, southwestern USA. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:94-104 [M. Carrano/M. Carrano/P. Wagner] |
43558 | A. B. Heckert, J. A. Spielmann, S. G. and A. P. Hunt. 2007. Biostratigraphic utility of the Upper Triassic aetosaur Tecovasuchus (Archosauria: Stagonolepididae), an index taxon of St. Johnsian (Adamanian: late Carnian) time. New Mexico Museum of Natural History and Science Bulletin 41:51-57 [R. Butler/R. Butler] | |
63048 | L. L. Jacobs. 1980. Additions to the Triassic vertebrate fauna of Petrified Forest National Park, Arizona. Journal of the Arizona-Nevada Academy of Science 15(1):12 [M. Carrano/M. Carrano] | |
30645 | ETE | L. L. Jacobs. 1985. Small vertebrate fossils from the Chinle Formation (Triassic) near St. Johns, Arizona. National Geographic Society Research Reports (1979) 20:417-419 [M. Carrano/M. Carrano] |
79159 | D. V. Kent, P. E. Olsen, C. Lepre, C. Rasmussen, R. Mundil, G. E. Gehrels, D. Giesler, R. B. Irmis, J. W. Geissman and W. G. Parker. 2019. Magnetochronology of the Entire Chinle Formation (Norian Age) in a Scientific Drill Core From Petrified Forest National Park (Arizona, USA) and Implications for Regional and Global Correlations in the Late Triassic. Geochemistry, Geophysics, Geosystems [P. Mannion/G. Varnham] | |
14122 | ETE | R. A. Long and P. A. Murry. 1995. Late Triassic (Carnian and Norian) Tetrapods from the Southwestern United States. New Mexico Museum of Natural History and Science Bulletin 4:1-254 [M. Carrano/M. Carrano/P. Wagner] |
25567 | ETE | S. G. Lucas, A. B. Heckert, and A. P. Hunt. 1997. Stratigraphy and biochronological significance of the Late Triassic Placerias quarry, eastern Arizona (U.S.A.). Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 203(1):23-46 [M. Carrano/M. Carrano] |
12930 | ETE | P. A. Murry and R. A. Long. 1989. Geology and paleontology of the Chinle Formation, Petrified Forest National Park and vicinity, Arizona and a discussion of vertebrate fossils of the southwestern Upper Triassic. In S. G. Lucas and A. P. Hunt (eds.), Dawn of the Age of Dinosaurs in the American Southwest, New Mexico Museum of Natural History, Albuquerque 29-64 [M. Carrano/M. Carrano/M. Carrano] |
11081 | ETE | F. A. Tannenbaum. 1983. The microvertebrate fauna of the Placerias and Downs Quarries, Chinle Formation (Upper Triassic) near St. Johns, Arizona. University of California, Berkeley 1-117 [M. Carrano/M. Carrano/M. Carrano] |