Tumbling Run, near Strasburg (Ordovician of the United States)

Where: Shenandoah County, Virginia (39.0° N, 78.4° W: paleocoordinates 29.6° S, 58.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Edinburg Formation, Blackriveran (460.9 - 449.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Preservation: replaced with silica

Collected by W. R. Evitt, H. B. Whittington; reposited in the USNM

Collection methods: chemical,

Primary reference: R. L. Parsley. 1981. Echinoderms from Middle and Upper Ordovician rocks of Kentucky. United States Geological Survey Professional Paper 1066-K:1-9 [G. Webster/G. Webster]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 195524: authorized by Pete Wagner, entered by Pete Wagner on 11.08.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhombifera
 Glyptocystitoida - Pleurocystitidae
Amecystis laevis Raymond 1921