Gray Daun Mine tracksite (Jurassic to of the United States)

Also known as Two Mile Creek, La Sal Mountains

Where: San Juan County, Utah (38.3° N, 109.1° W: paleocoordinates 34.6° N, 56.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Salt Wash Member (Morrison Formation), Late/Upper Kimmeridgian to Late/Upper Kimmeridgian (155.7 - 145.0 Ma)

• top of member

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; fine-grained, medium, intraclastic, yellow sandstone and green, red mudstone

• "tan, fine- to medium-grained sandstone with gray-green mudclasts"

Size class: macrofossils

Preservation: cast, trace

Collection methods: surface (in situ), peel or thin section,

• found by miners

Primary reference: J. R. Foster and M. G. Lockley. 1997. Probable crocodilian tracks and traces from the Morrison Formation (Upper Jurassic) of eastern Utah. Ichnos 5:121-129 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192731: authorized by Matthew Carrano, entered by Matthew Carrano on 17.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia -
Sauropoda indet. Marsh 1878 sauropod
 Crocodylia -
? Crocodylia indet. Owen 1842 crocodilian
"swim tracks"
Hatcherichnus sanjuanensis n. gen. n. sp. Foster and Lockley 1997 crocodilian