Cranaena fauna, lower type Cou Falls Mbr., Coralville Fm., Johnson Co., Iowa (Devonian of the United States)

Where: Johnson County, Iowa (41.7° N, 91.5° W: paleocoordinates 34.3° S, 37.4° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Cou Falls Member (Coralville Formation), Late/Upper Givetian (388.1 - 383.7 Ma)

• Late Givetian, Strophodonta plicata Zone.

• member-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal limestone

• Correlative with Gizzard Creek Mbr., which is said to be transgressive.
• Member is indicated on stratigraphic column as consisting of limestone with brachiopods, molluscs, echinoderms, corals, and stromatoporoids.

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 35481: authorized by Michael Foote, entered by Michael Foote on 17.12.2003, edited by Alycia Stigall

Creative Commons license: CC BY (attribution)

Taxonomic list

 Productida - Productellidae
Productella belanskii Stainbrook 1943
 Orthotetida - Schuchertellidae
 Strophomenida - Strophodontidae
 Athyridida - Athyrididae
 Terebratulida - Cranaenidae
 Spiriferinida - Cyrtinidae
 Spiriferida - Spinocyrtiidae
 Spiriferida - Mucrospiriferidae
 Spiriferida - Elythidae
 Pentamerida - Clorindidae
 Atrypida - Atrypidae
 Rhynchonellida - Stenoscismatidae
 Orthida - Schizophoriidae
Schizophoria lata Stainbrook 1940