Romeroville tracksite (Jurassic to of the United States)

Where: San Miguel County, New Mexico (35.5° N, 105.2° W: paleocoordinates 29.4° N, 50.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Summerville Formation, Late/Upper Callovian to Late/Upper Callovian (164.7 - 157.3 Ma)

• originally assigned to Morrison Formation (lower)

• bed-level stratigraphic resolution

Environment/lithology: "channel"; sandstone

• "a ripplemarked sandstone"

Size class: macrofossils

Preservation: mold/impression, trace

Collected by S. Lucas

Collection methods: surface (in situ),

Primary reference: M. G. Lockley, S. G. Lucas, and A. P. Hunt. 2000. Dinosaur tracksites in New Mexico: a review. In S. G. Lucas and A. B. Heckert (eds.), Dinosaurs of New Mexico. New Mexico Museum of Natural History and Science Bulletin 7:9-16 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 137377: authorized by Matthew Carrano, entered by Matthew Carrano on 15.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Saurischia - Eubrontidae
"Grallator sp." = Grallator (Eubrontes)
"Grallator sp." = Grallator (Eubrontes) Hitchcock 1845 theropod
trackway with 2 tracks