Cowan Lake Spillway, Bull Fork Fm. (Ordovician of the United States)

Where: Clinton County, Ohio (39.4° N, 83.9° W: paleocoordinates 25.8° S, 57.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bull Fork Formation, Richmondian (449.5 - 443.7 Ma)

• "Richmondian"

Environment/lithology: marine; wackestone

• "3 cm thick wackestone bed. BA2? but uncertain"

Size class: macrofossils

Primary reference: R. C. Frey. 1987. The paleoecology of a Late Ordovician shale unit from southwest Ohio and southeastern Indiana. Journal of Paleontology 61:242-267 [M. Uhen/J. Ju/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 372: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998, edited by Pete Wagner and Torsten Liebrecht

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Frey 1987b"
Trilobita
 Asaphida - Asaphidae
Isotelus maximus1 Locke 1838 trilobite
Ostracoda
 Palaeocopida -
Drepanella richardsoni1 Miller 1874 ostracod
Rhynchonellata
 Orthida - Plectorthidae
Hebertella sinuata1 Hall 1847
Bivalvia
 Myalinida - Ambonychiidae
 Ostreida - Pterineidae
"Caritodens demissa" = Pterinea demissa1
"Caritodens demissa" = Pterinea demissa1 Conrad 1842 oyster
 Mytilida -
 Modiomorphida - Allodesmatidae
Gastropoda
 Bellerophontida - Bucaniidae
"Bucania crassa" = Loxobucania crassa1
"Bucania crassa" = Loxobucania crassa1 Ulrich and Scofield 1897 snail
Cephalopoda
 Orthocerida -
Richmondoceras brevicameratum2 Frey 1995
MU 400T (suite of specimens, all are paratypes)
 Endocerida - Endoceratidae
Cameroceras sp. Conrad 1842
 Oncocerida - Diestoceratidae
Diestoceras eos2 Hall and Whitfield 1875
USNM 468730, MU 15905
Gymnolaemata
 Cheilostomata - Lacernidae
Arthropoma shafferi1
originally entered as "Arthropora sp."
Stenolaemata
 Trepostomida -
 Trepostomata - Monticuliporidae
Edrioasteroidea
 Isorophina - Isorophidae
Crinoidea
  -