Zuni Well Mound, PFV 215: Norian, Arizona

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda
Gastropoda indet. Cuvier 1795
Loughney et al. 2011
Bivalvia
Bivalvia indet. Linnaeus 1758
Loughney et al. 2011
Dipnoi
Dipnoi indet. (Müller 1884)
Loughney et al. 2011
Reptilia
Reptilia indet. Laurenti 1768
Loughney et al. 2011
Vancleavea campi Long and Murry 1995
Nesbitt et al. 2009 2 specimens
PEFO 31202, left femur; PEFO 34035, partial skeleton
Archosauria indet. (Cope 1869)
Loughney et al. 2011
Ornithodira indet. Gauthier 1986
Marsh and Parker 2020
PEFO 36741, left metatarsal I
Reptilia - Dinosauria
Dinosauria indet. Owen 1842
Marsh and Parker 2020
PEFO 34863, left femur (proximal end)
Reptilia
Revueltosaurus callenderi Hunt 1989
Parker and Irmis 2005
Teeth
Amphibia - Temnospondyli
Stereospondyli indet. (von Zittel 1887)
Loughney et al. 2011
Amphibia - Temnospondyli - Metoposauridae
Koskinonodon perfectus (Case 1922)
Gee and Parker 2018
synonym of Anaschisma browni
PEFO 35392, skull and intercentra
Apachesaurus gregorii Hunt 1993
Loughney et al. 2011
see common names

Geography
Country:United States State/province:Arizona County:Apache
Coordinates: 35.1° North, 109.8° West (view map)
Paleocoordinates:10.8° North, 48.3° West
Basis of coordinate:based on nearby landmark
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
Stratigraphy
Formation:Chinle Member:Petrified Forest
Stratigraphic resolution:bed
Stratigraphy comments: "Approximately 54 meters below a prominent tuffaceous sandstone bed known as the Black Forest Bed. Riggs et al. (2003) have determined a maximum age for this bed, and thus a minimum age for the quarries, of 213 +/- 1.7 based on U-Pb ages of detrital zircons."
Lithology and environment
Primary lithology:desiccation cracks,paleosol/pedogenic,gray "siliciclastic"
Secondary lithology:desiccation cracks,nodular,gray,red siltstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "in gray (N/5) claystone and variegated red (10R 3/1), purple (10R 5/2), and gray (N/5) clayey siltstone...Bones at the site primarily come from the gray (N/5) claystone layer that disconformably overlies the IHS deposits. The horizon bears abundant fine filled cracks, moderate to strong prismatic structure, slickensides, and pseudoanticlines (Fig. 8A). Thin sections from this horizon reveal well-developed striated b-fabric formed during alternating shrinking and swelling of the soil. Ped interiors are depleted in iron and manganese, whereas ped exteriors have accumulated ferric iron and manganese (III); this pattern develops during fluctuation of the water table. This claystone layer grades upward into variegated red (10R 3/1), purple (10R 5/2), and gray (N/5) clayey siltstone at the top of the exposure, upon which gastropod and bivalve shells can be found. This layer contains light greenish gray (5GY 7/1) mottles and numerous carbonate nodules (1.0–5.0 cm). Cracks filled with sandy and silty material are evident in thin section, but no b-fabric has developed, showing that this layer was not altered by pedoturbation. No rhizoliths or burrows were observed in this layer, suggesting that sediment was deposited rapidly."
Environment:fine channel fill
Geology comments: "deposited in a localized, scoured depression, such as an abandoned channel or chute where flow velocities were limited"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Associated major elements:some
Disassociated major elements:some
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: PEFO: Petrified Forest National Park, Arizona
Metadata
Also known as:PEFO
Database number:92811
Authorizer:R. Butler, M. Carrano, B. Gee Enterer:R. Butler, B. Gee, M. Carrano
Modifier:M. Carrano Research group:vertebrate
Created:2009-11-30 12:23:28 Last modified:2021-10-29 10:09:21
Access level:the public Released:2009-11-30 12:23:28
Creative Commons license:CC BY
Reference information

Primary reference:
31328. W. G. Parker and B. J. Barton. 2008. New information on the Upper Triassic archosauriform Vancleavea campi based on new material from the Chinle Formation of Arizona. Palaeontologia Electronica 11(3):14A [R. Butler/R. Butler]

Secondary references:

66611 B. M. Gee and W. G. Parker. 2018. Morphological and histological description of small metoposaurids from Petrified Forest National Park, AZ, USA and the taxonomy of Apachesaurus. Historical Biology [A. Dunhill/B. Allen]
78440 K. M. Loughney, D. E. Fastovsky, and W. G. Parker. 2011. Vertebrate fossil preservation in blue paleosols from the Petrified Forest National Park, Arizona, with implications for vertebrate biostratigraphy in the Chinle Formation. Palaios 26(11):700-718 [M. Carrano/M. Carrano/M. Carrano]
75605 A. D. Marsh and W. G. Parker. 2020. New dinosauromorph specimens from Petrified Forest National Park and a global biostratigraphic review of Triassic dinosauromorph body fossils. PaleoBios 37 [B. Gee/B. Gee]
31327 S. J. Nesbitt, M. R. Stocker, B. J. Small and A. Downs. 2009. The osteology and relationships of Vancleavea campi (Reptilia: Archosauriformes). Zoological Journal of the Linnean Society 157:814-864 [R. Butler/R. Butler/R. Butler]
15512ETE W. Parker and R. B. Irmis. 2005. Advances in Late Triassic vertebrate paleontology based on new material from Petrified Forest National Park, Arizona. Vertebrate Paleontology in Arizona, New Mexico Museum of Natural History and Science Bulletin 29:45-58 [M. Carrano/K. Maguire/M. Carrano]