Where: Niobrara County, Wyoming (43.3° N, 104.7° W: paleocoordinates 49.8° N, 79.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lance Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bone located about 1 m below boundary clay

• bed-level stratigraphic resolution

Environment/lithology: fluvial; poorly lithified sandstone

Size class: macrofossils

Collection methods: surface (in situ),

Primary reference: B. F. Bohor, D. M. Triplehorn, D. J. Nichols and H. T. Millard, Jr. 1987. Dinosaurs, spherules, and the "magic" layer: a new K-T boundary clay site in Wyoming. Geology 15:896-899 [M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 60555: authorized by Matthew Carrano, entered by Kaitlin Maguire on 17.05.2006, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)