Also known as USNM 23w, Pleasent Hill Limestone Fm., Huntingdon Co., PA - Rasetti 1965

Where: Huntingdon County, Pennsylvania (40.7° N, 78.1° W: paleocoordinates 30.8° S, 87.0° W)

• outcrop-level geographic resolution

When: Pleasant Hill Limestone Formation, Solvan to Solvan (510.2 - 499.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Reposited in the USNM

• Collection consists of free cheeks, cranidia, and pygidia, some with preserved tests. Collections containing the intitials USNM were collected by Butts in the mid-late 1940s while mapping outcrops

Primary reference: F. Rasetti. 1965. Middle Cambrian trilobites of the Pleasent Hill Formation in Central Pennsylvania. Journal of Paleontology 39(5):1007-1014 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8599: authorized by Mark Patzkowsky, entered by Phil Borkow on 07.08.2000

Creative Commons license: CC BY (attribution)