Where: Rock Island County, Illinois (42.0° N, 91.0° W: paleocoordinates 33.8° S, 36.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Rapid Member (Little Cedar Formation), Givetian (387.7 - 382.7 Ma)

• Cruziana trilobite cluster

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, bioturbated, shelly/skeletal, argillaceous, calcareous wackestone

Size classes: macrofossils, mesofossils

Collection methods: Cruziana trilobite cluster; three closely-spaced locations but sampled a single bed: therefore setting as pooled samples

Primary reference: W. J. Hickerson. 1997. Middle Devonian (Givetian) trilobite clusters from eastern Iowa and northwestern Illinois. In C. E. Brett, G. C. Baird (eds.), Paleontological Events: Stratigraphic, Ecological, and Evolutionary Implications 224-246 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 76642: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 27.11.2007

Creative Commons license: CC BY (attribution)