Where: Johnson County, Iowa (41.7° N, 91.5° W: paleocoordinates 33.9° S, 37.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Rapid Member (Cedar Valley Formation), Givetian (387.7 - 382.7 Ma)
• STRATIGRAPHIC RELATIONS: From the Rapid Mbr of the Cedar Valley Fm, which overlies the Solon Mbr, and is overlain by the Coralville Mbr of the same fm. AGE: upper Givetian-lower Frasnian. STRATIGRAPHIC POSITION: From loose block in quarry floor.
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified, fine-grained, shelly/skeletal, gray limestone
Size class: macrofossils
Preservation: original phosphate
Collected by Stouffer in 1964
Collection methods: bulk, acetic, sieve,
• COLLECTOR: L. Stouffer, 1964. REPOSITORY: University of Iowa.
Primary reference: J. J. Straka and H. A. Semken. 1969. A dinichthyid in Middle Devonian of Iowa. Journal of Paleontology 43(6):1423-1428 [A. Hendy/A. Hendy/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 90325: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Polychaeta | |
Placodermi | |
Dinichthyidae indet. Newberry 1888 armour-plated fish | |
Conodonta | |
"Polygnathus decorosus" = Polygnathus decorosa
"Polygnathus decorosus" = Polygnathus decorosa Stauffer 1938 conodont | |
Icriodus nodosus conodont |