Weisburg (Bull Fork Fm.) (Ordovician of the United States)

Where: Franklin County, Indiana (39.2° N, 85.0° W)

• Paleocoordinates: 24.9° S, 112.7° W (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• "'Waynesville biofacies' in the Bull Fork Formation."

• 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: replaced with calcite

Collection methods: UC = University of Cincinnati

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 87966: authorized by Björn Kröger, entered by Torsten Liebrecht on 29.03.2009

Creative Commons license: CC0 (CC0)

Taxonomic list

• see comments on lithology
Show authors, comments, and common names
Cephalopoda
 Actinocerida - Ormoceratidae
Orthonybyoceras dyeri
Orthonybyoceras dyeri Miller 1875
UC 31380