ammonites
Liberty (Ordovician of the United States)

Where: Union County, Indiana (39.6° N, 84.9° W: paleocoordinates 25.2° S, 58.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• "'Waynesville and 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

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 87991: authorized by Björn Kröger, entered by Torsten Liebrecht on 30.03.2009