MCZ 91/78A, MCZ 68/78A (Kayenta Formation) (Jurassic to of the United States)

Also known as Silty facies, MCZ 8831, MCZ 8836

Where: Coconino County, Arizona (35.8° N, 111.1° W: paleocoordinates 19.4° N, 49.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Silty Facies Member (Kayenta Formation), Sinemurian to Sinemurian (199.3 - 182.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "floodplain"; green, red, blue siltstone and sandstone

• "These claystones [silty facies] have been interpreted as paleosols formed within floodplain overbank deposits (Clark and Fastovsky 1986)." The source of the southern silty facies (versus northern typical facies) was the Cordilleran magmatic arc to the southeast (in Luttrell 1987, from Sues et al. 1994), whereas the source of the typical facies was the Uncompahgre Uplift in Colorado.

Size class: macrofossils

Preservation: concretion

Reposited in the MCZ

Primary reference: H.-D. Sues. 1986. Dinnebitodon amarali, a new tritylodontid (Synapsida) from the Lower Jurassic of western North America. Journal of Paleontology 60(3):758-762 [R. Whatley/R. Whatley]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 59930: authorized by Robin Whatley, entered by Robin Whatley on 21.04.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Lat longs for MCZ 8831 and 8836 are the same, field numbers differ.
Show authors, comments, and common names
Osteichthyes
 Therapsida - Tritylodontidae
Dinnebitodon amarali
Dinnebitodon amarali Sues 1986 mammaliamorph
MCZ 8831 includes two left dentaries