Addisons Creek, N of Oxford (Ordovician of the United States)

Also known as collection OH-15, S of Lake Acton dam

Where: Butler County, Ohio (39.6° N, 84.7° W: paleocoordinates 25.3° S, 58.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• " Upper 15 ft of the 'Waynesville biofacies'" and the lower 30 ft of the 'Liberty biofacies'. "

• bed-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 88098: authorized by Björn Kröger, entered by Torsten Liebrecht on 01.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• see comments on lithology
Cephalopoda
 Orthocerida - Orthoceratidae
Pleurorthoceras clarksvillense Foerste 1924
MU 268T, 269T (bot are hypotypes), MU 29853 (suite of 9 specimens)
Stenolaemata
 Cystoporata - Ceramoporidae
Spatiopora sp. Ulrich 1882
encrusting on shells of nautiloid specimens