Where: Franklin County, Iowa (42.8° N, 93.2° W: paleocoordinates 18.0° S, 36.5° W)
• coordinate based on political unit
• local area-level geographic resolution
When: Streptorhynchus zone, Chapin Formation, Tournaisian (358.9 - 346.7 Ma)
• Laudon (1931) placed the Chapin Member in the Hampton Formation. The Chapin has since been tentatively given formation status, and the Hampton is no longer recognized. See Woodson, 1989, An excursion to the historic Gilmore City quarries, Geol. Soc. of Iowa Guidebook 50.
• group of beds-level stratigraphic resolution
Environment/lithology: offshore shelf; gray, cherty/siliceous carbonate and dolomite
Primary reference: L. R. Laudon. 1931. The Stratigraphy of the Kinderhook Series of Iowa. Iowa Geological Survey 35:333-452 [A. Miller/A. Webber/P. Wagner]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 3313: authorized by Arnold Miller, entered by Andrew Webber on 29.07.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
Rhynchonellata | |
Schizophoria chouteauensis Weller 1914 | |
Strophomenata | |
"Productella concentrica" = Chonetipustula concentrica
"Productella concentrica" = Chonetipustula concentrica Hall 1857 | |
"Productus ovatus" = Linoproductus ovatus
"Productus ovatus" = Linoproductus ovatus Hall 1858 | |
Schellwienella inflata White and Whitfield 1862 | |
Streptorhynchus tenuicostatum Weller 1914 |