ammonites
north side, Lightning Creek (YPM 1830) (Cretaceous of the United States)

Also known as Torosaurus latus type site

Where: Niobrara County, Wyoming (43.2° N, 104.6° W: paleocoordinates 49.7° N, 79.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Lance Formation, Maastrichtian (70.6 - 65.5 Ma)

• "Laramie"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, concretionary, blue, calcareous sandstone

• "an extremely hard bluish calcareous sandstone concretion"

Size class: macrofossils

Preservation: mold/impression, concretion

Collected by J. B. Hatcher in 1891; reposited in the YPM

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: J. B. Hatcher, O. C. Marsh, and R. S. Lull. 1907. The Ceratopsia. Monographs of the United States Geological Survey 49:1-198 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46134: authorized by Matt Carrano, entered by Matt Carrano on 04.01.2005