Also known as Reef 813

Where: Illinois (41.9° N, 87.7° W: paleocoordinates 25.4° S, 50.7° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Racine Formation, Wenlock to Wenlock (433.4 - 423.0 Ma)

• "Middle-Upper Wenlockian to Ludlovian...Racine Formation and equivalents. The community may occur only in the lower and middle Racine. Its presence has been confirmed at three of the classic Racine collecting sites, the Horlick Reef Complex (type locality for the Racine), the Bridgeport Reef, and the Hawthorne Reef..."

• formation-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; dolomitic, shelly/skeletal packstone and dolomitic, shelly/skeletal grainstone

Collection methods: I have included echinoderms and brachiopods listed (with abundances) in table 45.31, as well as other taxa mentioned in text.

Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26770: authorized by Michael Foote, entered by Michael Foote on 31.10.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)