Just east of Hagan Switchback on the Louisville and Nashville Railroad (Ordovician of the United States)

Where: Lee County, Virginia (36.7° N, 83.3° W: paleocoordinates 29.0° S, 63.3° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Surgener Formation, Ashbyan (460.9 - 449.5 Ma)

• Occupy interval from Elway to Peery

• formation-level stratigraphic resolution

Environment/lithology: black limestone and brown, green, red mudstone

• chalky-weathering dark limestone, cherty dark limestone, gray to buff mudstone, and maroon mudstone

Size class: macrofossils

Reposited in the USNM

Primary reference: G. A. Cooper. 1956. Chazyan and related brachiopods. Smithsonian Miscellaneous Collections 127:1-1245 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 203290: authorized by Pete Wagner, entered by Pete Wagner on 08.08.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Strophomenidae
Rhipidomena tenuitesta
Rhynchonellata
 Rhynchonellida - Ancistrorhynchidae
Ancistrorhyncha crassa
 Rhynchonellida - Oligorhynchiidae
Oligorhynchia bifurcata