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Cedar Valley - Little Cedar - Rapid, USA

Group	Cedar Valley
Formation	Little Cedar
Member	Rapid
Age:	388 - 383 Ma Devonian
Interval	Givetian
Number of Collections	33
Number of Occurrences	73

Recorded Sample Locations

Location	Region	Stratigraphic Name
Moscow	Iowa County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Buffalo Quarry	Scott County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Iowa City	Johnson County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Brandon	Black Hawk County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Littleton	Black Hawk County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Newport	Johnson County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Shellsburg	Fayette County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Muscatine County	Muscatine County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Palo	Fayette County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Salt Spring Hollow	Calhoun County, Illinois, USA	Cedar Valley - Little Cedar - Rapid
Solon	Johnson County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Vinton	Tama County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Waverly	Bremer County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Iowa City	Johnson County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Revere	Clark County, Missouri, USA	Cedar Valley - Little Cedar - Rapid
Salt Creek	Davis County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Waterloo	Black Hawk County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Randalia	Fayette County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Milwaukee	Sheboygan County, Wisconsin, USA	Cedar Valley - Little Cedar - Rapid
Johnson County	Washington County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Dodge's Ravino	Scott County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Linn Junction	Buchanan County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
Rapid Creek	Johnson County, Iowa, USA	Cedar Valley - Little Cedar - Rapid
F1 LCf Om	Clinton County, Iowa, USA	Cedar Valley - Little Cedar - Rapid

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Coralville - Cou Falls	388 - 383 Ma Devonian		4
Lime Creek - Independence Shale	383 - 372 Ma Late/Upper Devonian		11
Lime Creek - Owen	383 - 372 Ma Late/Upper Devonian	limestone/"shale", "limestone"	46
Little Cedar - Rapid	388 - 383 Ma Devonian	wackestone	40
Little Cedar - Solon	388 - 383 Ma Devonian		11
Milwaukee - Berthelet	388 - 383 Ma Devonian	dolomite	6
Cedar Valley	388 - 372 Ma Devonian		20
Cedar Valley - Coralville	388 - 383 Ma Devonian	grainstone, "limestone"	58
Cedar Valley - Coralville - Cou Falls	388 - 383 Ma Devonian	limestone	63
Cedar Valley - Coralville - Gizzard Creek	388 - 383 Ma Devonian	dolomite	20
Cedar Valley - Linwood	388 - 372 Ma Devonian		1
Cedar Valley - Lithograph City - Andalusia	388 - 372 Ma Devonian	shale/packstone, dolomite/"reef rocks"	22
Cedar Valley - Lithograph City - State Quarry	383 - 372 Ma Late/Upper Devonian	grainstone/packstone	28
Cedar Valley - Little Cedar	388 - 383 Ma Devonian		164
Cedar Valley - Little Cedar - Solon	388 - 383 Ma Devonian		20
Cedar Valley - Shell Rock	383 - 372 Ma Late/Upper Devonian		30
Traverse - Cedar Valley - Linwood	388 - 383 Ma Devonian	limestone	1
Traverse - Cedar Valley - Littleton	388 - 383 Ma Devonian	limestone	8

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Greenops sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Acastidae : *Greenops*	387.7 - 382.7 Ma Devonian
Eldredgeops rana species	7	Animalia : Arthropoda : Trilobita : Phacopida : Phacopidae : Eldredgeops : *Eldredgeops rana*	387.7 - 382.7 Ma Devonian
Crassiproetus sp. genus	6	Animalia : Arthropoda : Trilobita : Proetida : Proetidae : *Crassiproetus*	387.7 - 382.7 Ma Devonian
Dechenella sp. genus	6	Animalia : Arthropoda : Trilobita : Proetida : Proetidae : *Dechenella*	387.7 - 382.7 Ma Devonian
Athyris sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Athyridida : Athyrididae : *Athyris*	387.7 - 382.7 Ma Devonian
Pseudoatrypa sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : *Pseudoatrypa*	387.7 - 382.7 Ma Devonian
Spinatrypa sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : *Spinatrypa*	387.7 - 382.7 Ma Devonian
Schizophoria sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Orthida : Schizophoriidae : *Schizophoria*	387.7 - 382.7 Ma Devonian
Schizophoria (Schizophoria) iowensis species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Schizophoriidae : Schizophoria : *Schizophoria (Schizophoria) iowensis*	387.7 - 382.7 Ma Devonian
Schizophoria lata species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Schizophoriidae : Schizophoria : *Schizophoria lata*	387.7 - 382.7 Ma Devonian
Tylothyris sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Mucrospiriferidae : *Tylothyris*	387.7 - 382.7 Ma Devonian
Spinocyrtia sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Spinocyrtiidae : *Spinocyrtia*	387.7 - 382.7 Ma Devonian
Cranaena sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Terebratulida : Cranaenidae : *Cranaena*	387.7 - 382.7 Ma Devonian
Douvillina sp. genus	6	Animalia : Brachiopoda : Strophomenata : Strophomenida : Douvillinidae : *Douvillina*	387.7 - 382.7 Ma Devonian
Strophodonta umbonata species	7	Animalia : Brachiopoda : Strophomenata : Strophomenida : Stropheodontidae : Strophodonta : *Strophodonta umbonata*	387.7 - 382.7 Ma Devonian
Strophomena (Strophodonta) sp. subgenus	6.3	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophodontidae : *Strophomena (Strophodonta)*	387.7 - 382.7 Ma Devonian
Leptodesma (Leiopteria) sp. subgenus	6.3	Animalia : Mollusca : Bivalvia : Ostreida : Pterineidae : Leptodesma : *Leptodesma (Leiopteria)*	387.7 - 382.7 Ma Devonian
Fraipontia bella species	7	Animalia : Mollusca : Rostroconchia : Conocardiida : Hippocardiidae : Fraipontia : *Fraipontia bella*	387.7 - 382.7 Ma Devonian

References

Cooper G. A., Cloud P.E. (1938) New Devonian fossils from Calhoun County, Illinois, Journal of Paleontology 12 5, 444-460

Hickerson W. (1992) Trilobites from the Late Givetian Solon Member, Little Cedar Formation of Eastern Iowa and Northwestern Illinois, in, The stratigraphy, paleontology, depositional and diagenetic history of the Middle-Upper Devonian Cedar Valley Group of Central and Eastern Iowa 16

Rode A. L., Lieberman B. S. (2004) Using GIS to unlock the interactions between biogeography, environment, and evolution in middle and Late Devonian brachiopods and bivalves, Palaeogeography, Palaeoclimatology, Palaeoecology 211 3-4, 345-359

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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