Where: Baca County, Colorado (37.5° N, 102.3° W: paleocoordinates 35.8° N, 60.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lower Member (Mesa Rica Sandstone Formation), Late/Upper Albian (105.3 - 99.6 Ma)

• Sequence 3 - "the exposed section represents the Mesa Rica Sandstone and overlying Dry Creek Canyon Member."

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; fine-grained sandstone and siltstone

Size class: macrofossils

Preservation: mold/impression, trace

Collected by J. M. Holbrook

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

Primary reference: M. G. Lockley, J. Holbrook, R. Kukihara and M. Matsukawa. 2006. An ankylosaur-dominated dinosaur tracksite in the Cretaceous Dakota Group of Colorado: paleoenvironmental and sequence stratigraphic context. In S. G. Lucas and R. M. Sullivan (eds.), Late Cretaceous Vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin 35:95-104 [M. Carrano/M. Carrano] more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 77419: authorized by Matt Carrano, entered by Steven Miller on 11.01.2008, edited by Matt Carrano