MCZ 79A/7, Eopneumatosuchus type locality (Jurassic to of the United States)

Also known as blue layer, Silty Facies

Where: Coconino County, Arizona (36.0° N, 111.3° W: paleocoordinates 19.6° N, 50.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kayenta Formation (Glen Canyon Group), Sinemurian to Sinemurian (199.3 - 182.7 Ma)

• Palynoflorulle, Scelidosaurus scutes, and magnetostratigraphy suggests Kayenta may be Sinemurian and/or Pliensbachian. The Eopneumatosuchus type locality samples the "blue layer", which is stratigraphically lower than the Harvard Gold Spring Quarry to the south.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; blue, silty, carbonaceous siltstone and sandstone

• carbonaceous deposits and sandstone stringer along with taxa suggest seasonal flooding, "and that the water table was probably high during most of the year."
• quarry samples the "blue" layer of sediment in the silty facies of the Kayenta Formation. Locality contains carbonacious deposits and a sandstone stringer.

Size classes: macrofossils, mesofossils, microfossils

Collected by J. Clark in 1981, 1983; reposited in the MCZ

Collection methods: bulk, surface (float), chemical, sieve,

• Museum of Northern Arizona (MNA)

•Microvertebrates were collected by screenwashing and surface collection, then recovered from the matrix by heavy liquid separation.

Primary reference: A. W. Crompton and K. K. Smith. 1980. A new genus and species of crocodilian from the Kayenta Formation (Late Triassic?) of Northern Arizona. Aspects of Vertebrate History: Essays in Honor of Edwin Harris Colbert, L. L. Jacobs (ed.), Museum of Northern Arizona Press 193-217 [R. Whatley/R. Whatley/R. Whatley]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27717: authorized by John Alroy, entered by Robin Whatley on 23.12.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Numbers of specimens listed may be representative of many more specimens.

•Indeterminate specimens listed with "from earlier reference" tag are macrofossils reported on in detail in Clark and Fastovsky (1986); Padian (1989a); or Sues et al. (1994).

Show authors, comments, and common names
Reptilia
 Diapsida -
Diapsida indet.
Diapsida indet. diapsid
MCZ 9202, tooth
 Dinosauria -
Dinosauria indet.
Dinosauria indet. dinosaur
MCZ 9203, tooth
 Loricata -
Crocodylomorpha indet., Eopneumatosuchus colberti n. gen. n. sp., Crocodylia indet.
Crocodylomorpha indet. crocodilian
MCZ 9199, fragment of pseudosuchian dermal scute
Eopneumatosuchus colberti n. gen. n. sp. Bronzati et al. 2012 crocodilian
MNA P1.2460, partial skull (holotype)
Crocodylia indet. crocodilian
MCZ 9200, dermal scute, probably Eopneumatosuchus
Gnathostomata
  -
Chondrichthyes indet.
Chondrichthyes indet. Huxley 1880 cartilaginous fish
MCZ 13897, tooth