Crocodile Hill locality (SMU Loc. 230, PFV 124) (Triassic of the United States)

Also known as Petrified Forest, Crocodile Hill Quarry, Blue Mesa

Where: Navajo County, Arizona (34.9° N, 109.8° W: paleocoordinates 10.6° N, 48.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Blue Mesa Member (Chinle Formation), Norian (228.0 - 208.5 Ma)

• "A greenish-gray mudstone in the upper portion ofthe Blue Mesa Member of the Chinle Formation(sensu Woody 2006) (Unit 14 of the Blue Mesa Member [Petrified Forest Formation, Chinle Group] type section of Lucas 1993). This horizon is situated approximately 14 meters above the Newspaper Rock Bed and approximately 9 meters below the base of the overlying Sonsela Member. Palynomorphs recovered from this horizon are considered to be latest Carnian in age, but recent recalibration of the Triassic timescale based on magnetostratigraphy and a new radiometric date from European marine sections suggest that most of the Chinle Formation, including this horizon, may be Norian in age."

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; intraclastic, gray, argillaceous, cherty/siliceous siltstone

• "silty mudstone...color varies from light gray (2.5 Y N7) to gray (2.5 Y N5-N7); fossil horizon 0.04 meter thick muddy siltstone with rip-up clasts; minor red chert; some organics; grades upward into clay pebble laminae"

Size classes: macrofossils, mesofossils

Collected by C. L. Camp, P. A. Murry in the 1923, 1980s; reposited in the UCMP

Collection methods: quarrying,

Primary reference: D. D. Gillette, S. R. Ash, and R. A. Long. 1986. Paleontology of the Petrified Forest National Park, Arizona. In J. D. Nations, C. M. Conway, & G. A. Swann (eds.), Geology of Central and Northern Arizona. Field Trip Guidebook for Geological Society of America Rocky Mountain Section Meeting 58-69 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 84264: authorized by Matthew Carrano, entered by Matthew Carrano on 02.10.2008, edited by Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

 Xenacanthiformes - Xenacanthidae
"Xenacanthus moorei" = Triodus moorei2, "Xenacanthus ? moorei" = Triodus moorei2
"Xenacanthus moorei" = Triodus moorei2 Woodward 1889 elasmobranch
PEFO 3821
"Xenacanthus ? moorei" = Triodus moorei2 Woodward 1889 elasmobranch
PEFO 3824, 2847
 Hybodontiformes - Lonchidiidae
"Lissodus humblei" = Lonchidion humblei2, "? Lissodus humblei" = Lonchidion humblei2
"Lissodus humblei" = Lonchidion humblei2 Murry 1981 elasmobranch
PEFO 3825
"? Lissodus humblei" = Lonchidion humblei2 Murry 1981 elasmobranch
PEFO 3828
 Perleidiformes - Colobodontidae
Colobodontidae indet.2 Stensiƶ 1916
PEFO 3839-40
 Palaeonisciformes - Redfieldiidae
? Redfieldiidae indet.2 Hutchinson 1973
PEFO 3836
 Dipnoi - Arganodontidae
Arganodus sp.1 Martin 1979 lungfish
 Temnospondyli - Metoposauridae
Apachesaurus gregorii1, "Buettneria perfecta" = Koskinonodon perfectus1
Apachesaurus gregorii1 Hunt 1993 tetrapod
UCMP 27100, centra
"Buettneria perfecta" = Koskinonodon perfectus1 Case 1922 tetrapod
UCMP 26732, 27103, 27089, 27085, 26695, 26715, 27073, seven incomplete skulls. Large number of pectoral elements
 Eosuchia - Doswelliidae
Vancleavea campi4 Long and Murry 1995 archosauromorph
UCMP 152647, caudal vertebra
 Pseudosuchia - Stagonolepididae
"Stagonolepis wellesi" = Calyptosuchus wellesi3
"Stagonolepis wellesi" = Calyptosuchus wellesi3 Long and Ballew 1985 archosaur
UCMP fragments of paramedian scute
 Phytosauria - Parasuchidae
"Leptosuchus adamanensis" = Smilosuchus adamanensis1
"Leptosuchus adamanensis" = Smilosuchus adamanensis1 Camp 1930 archosaur
 Eosuchia -
Acallosuchus rectori n. gen. n. sp.1
Acallosuchus rectori n. gen. n. sp.1 Long and Murry 1995 diapsid
UCMP 27096, partial skull
 Therapsida - Stahleckeriidae
? Placerias sp.1 Lucas 1904 dicynodont
Colognathus obscurus1 Case 1928 amniote
UCMP 136075, partial tooth