Where: Iowa (43.3° N, 92.8° W: paleocoordinates 31.4° S, 37.4° W)
• coordinate based on political unit
• basin-level geographic resolution
When: Mason City Member (Shell Rock Formation), Early/Lower Frasnian (383.7 - 382.4 Ma)
• Mainly in early Frasnian Tenticospirifer shellrockensis zone, but extending slightly into overlying Strophodonta cicatricosa zone.
• member-level stratigraphic resolution
Environment/lithology: marine; shelly/skeletal, argillaceous limestone and dolomitic grainstone
Collection methods: Fauna of the Shell Rock not reported here include mollusks, corals, stromatoporoids, and echinoderms. These elements usually dominate the assemblages.
Primary reference: J. Day. 1988. The brachiopod succession of the Late Givetian-Frasnian of Iowa. In N. J. McMillan, A. F. Embry, and D. J. Glass (eds.), Devonian of the World, Volume III. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada 303-325 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 35493: authorized by Michael Foote, entered by Michael Foote on 17.12.2003
Creative Commons license: CC BY (attribution)