Where: Marshall County, Iowa (42.0° N, 92.8° W: paleocoordinates 20.9° S, 36.9° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Eagle City Limestone Member (Hampton Formation), Kinderhookian (358.9 - 352.0 Ma)

• "Without more data I ... tentatively accept Laudon's (1931, p. 412) assignment of a Kinderhookian age for the upper Hampton Formation. Nevertheless, ther is no evidence from the brachiopod fauna, including the nonsilicified specimens, that would preclude and early Osagian age for these beds, especially considering the possibility that the upper Hampton formation sequence of central Iowa could conceivably represent a nearly continuous record of latest Kinderhookian - earliest Osagian sedimentation."

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, ooidal limestone and lithified, dolomitic limestone

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

• Type specimens are in the collections at the Univeristy of Illinois, Urbana.

Primary reference: J. L. Carter. 1971. New early Mississippian silicified brachiopods from central Iowa. Smithsonian Contributions to Paleobiology 3:245-255 [N. Heim/N. Heim]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 62482: authorized by Noel Heim, entered by Noel Heim on 20.07.2006

Creative Commons license: CC BY (attribution)