Where: Washington County, Virginia (36.8° N, 82.3° W: paleocoordinates 30.3° S, 78.5° W)

• coordinate stated in text

• local area-level geographic resolution

When: Chepultepec Formation, Tremadoc (486.5 - 477.7 Ma)

• Author's describe the fauna as indicative of "earliest Ordovician." USGS Geolex database lists Chepultepec an opinion as member of Beekmantown Fm (not in current usage by USGS). Otherwise, age constraint is poor. AGE: Tremadoc; refined by A. Hendy (6/2009) on the basis of biostratigraphic data.

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, burrowed, dolomitic, calcareous, cherty/siliceous limestone and dolomite

Primary reference: C. S., J.r. Bartlett and H. W. Webb. 1971. Geology of the Bristol and Wallace quadrangles, Virginia. Virginia Division of Mineral Resources Report of Investigations 25:1-93 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6971: authorized by John Alroy, entered by Mike Sommers on 18.04.2000, edited by Pete Wagner

Creative Commons license: CC BY (attribution)