Roadcut along US 42 (Ordovician of the United States)

Also known as Was: Roadcut along US 42, southwestern Ohio, Waynesville Formation, T. duseri shale

Where: Warren County, Ohio (39.5° N, 84.1° W: paleocoordinates 25.7° S, 57.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Aphelognathus grandis conodont zone, Fort Ancient Member (Waynesville Formation), Richmondian (449.5 - 443.7 Ma)

• Richmondian; Unit located about 11-13 m above Arnheim-Waynesville contact. Treptoceras duseri shale

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; blue claystone

• Deeper-water, low-energy, mud-bottom environment. Heavily oxygenated.
• Massive blue claystone.

Size class: macrofossils

Primary reference: R. C. Frey. 1988. Paleoecology of Treptoceras duseri (Michelinoceratida, Proteoceratidae) from Late Ordovician of southwestern Ohio. New Mexico Bureau of Mines and Mineral Resources Memoir 44:79-101 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27499: authorized by Steven Holland, entered by Tori Hanson on 07.12.2002, edited by Pete Wagner, Alycia Stigall and Torsten Liebrecht

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Calymenidae
Flexicalymene meeki2 Foerste 1910 trilobite
 Asaphida - Asaphidae
Isotelus maximus2 Locke 1838 trilobite
Strophomenata
 Strophomenida - Rafinesquinidae
Rhynchonellata
 Atrypida - Anazygidae
Zygospira modesta2 Hall 1847
 Orthida - Dalmanellidae
"Onniella meeki" = Cincinnetina meeki2
"Onniella meeki" = Cincinnetina meeki2 Miller 1875
 Orthida - Platystrophiidae
Bivalvia
 Cyrtodontida - Cyrtodontidae
Vanuxemia waynesvillensis n. sp.1 Frey 1980 clam
 Myalinida - Ambonychiidae
 Modiomorphida - Modiomorphidae
 Unioni - Lyrodesmatidae
Lyrodesma major2 Ulrich 1879 clam
 Nuculida - Cardiolariidae
Gastropoda
 Trochonematoidea - Lophospiridae
"Schizolopha tropidophora" = Paupospira tropidophora2
"Schizolopha tropidophora" = Paupospira tropidophora2 Meek 1873 snail
 Bellerophontida - Sinuitidae
"Sinuites subcompressus" = Sinuites subcompressa2
"Sinuites subcompressus" = Sinuites subcompressa2 Ulrich and Scofield 1897 snail
Tergomya
 Cyrtonellida - Cyrtolitidae
Cyrtolites retrorsus2 Ulrich and Scofield 1897
Cephalopoda
 Orthocerida - Proteoceratidae
Treptoceras cincinnatiensis3 Miller 1875
MU 17185
Treptoceras duseri Hall and Whitfield 1875
Treptoceras fosteri3 Miller 1875
MU 276T, 419T (both are hypotypes)
 Oncocerida - Valcouroceratidae
Stenolaemata
 Trepostomida -
 Trepostomata - Halloporidae
Ancienta
  -
"Ancienta ohioensis" = Ancientia2
"Ancienta ohioensis" = Ancientia2