Rockford brick and Tile Company pit, Lime Creek Formation, Iowa (Devonian of the United States)

Where: Floyd County, Iowa (43.1° N, 93.0° W: paleocoordinates 29.2° S, 37.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Cerro Gordo Member (Lime Creek Formation), Frasnian (382.7 - 372.2 Ma)

• horizon based on feet above the base of the Cerro Gordo Member

• bed-level stratigraphic resolution

Environment/lithology: marine; calcareous shale

• the fossil material came predominantly from shales or lime shales, and attempts to differentiate samples on the basis of sediment type would have been extremely difficult

Collection methods: mechanical,

Primary reference: T. L. De Keyser. 1977. Late Devonian (Frasnian) brachipod community patterns in western Canada and Iowa. Journal of Paleontology 51(1):181-196 [A. Miller/K. Layou/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6250: authorized by Arnold Miller, entered by Karen Layou on 14.02.2000, edited by Alycia Stigall

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Douvillinidae
Douvillina delicata, Douvillina distans
 Strophomenida - Leptostrophiidae
Nervostrophia sp.
 Strophomenida - Strophodontidae
"Strophodonta biplacata" = Strophomena (Strophodonta)
"Strophodonta biplacata" = Strophomena (Strophodonta)
 Productida - Monticuliferidae
Devonoproductus sp.
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
Cupularostrum ? contracta
 Rhynchonellida - Camarotoechiidae
Camarotoechia crassiplicata, Camarotoechia saxatillis
 Rhynchonellida - Leiorhynchidae
Leiorhynchus argenteum
 Orthida - Schizophoriidae
Schizophoria sp.
Schizophoria sp. King 1850
 Terebratulida - Cranaenidae
Cranaena navicella
 Spiriferida - Cyrtospiriferidae
Tenticospirifer sp., Cyrtospirifer sp.
Cyrtospirifer sp. Nalivkin 1924
 Spiriferida - Theodossiidae
Theodossia sp.
Theodossia sp. Nalivkin 1925
 Atrypida - Atrypidae
"Pseudatrypa sp." = Pseudoatrypa, "Pseudatrypa devoniana" = Pseudoatrypa devoniana, Spinatrypa sp., Spinatrypa aspera
"Pseudatrypa sp." = Pseudoatrypa Copper 1973
[entered as Pseudoatrypa sp.]
"Pseudatrypa devoniana" = Pseudoatrypa devoniana Webster 1921
Spinatrypa sp. Stainbrook 1951
Spinatrypa aspera
aspera aspera
Bivalvia
 Lucinida - Mactromyidae
Paracyclas validalinea, Paracyclas dubia
Paracyclas dubia Beushausen 1895 clam