Road cut at junction of U.S. 22 and OH 380 (Ordovician of the United States)

Also known as collection OH-11, Todds Fork

Where: Clinton County, Ohio (39.4° N, 83.9° W: paleocoordinates 25.8° S, 57.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bull Fork Formation, Richmondian (449.6 - 445.5 Ma)

• " 'Liberty biofacies' in the Bull Fork Formation." = Liberty Formation of other writers.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; claystone and shelly/skeletal limestone

• " [...] deposited in deeper water, lower-energy environments, [...]. Water depths were below fair-weather wave base but within the zone of storm-current reworking, [...] "
• "" [...] interbedded clay shale and thin fossiliferous limestone [...]. Preserved faunas contains diverse, abundant brachiopods, bryozoans, corals, stromatoporoids, gastropods, nautiloids, pelecypods, ostracodes, trilobites, and crinoids."

Size class: macrofossils

Preservation: cast

Collection methods: MU = Limper Museum of Geology at Miami University

Primary reference: R. C. Frey. 1995. Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio. U.S. Geological Survey Professional Paper 1066P:1-126 [S. Holland/S. Holland]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88061: authorized by Björn Kröger, entered by Torsten Liebrecht on 31.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• see comments on lithology
Show authors, comments, and common names
Cephalopoda
 Orthocerida - Proteoceratidae
Treptoceras fosteri
Treptoceras fosteri Miller 1875
MU 422T, MU 29855 (suite of 3 specimens)