ammonites
Sample 11, Liberty Fm., Ripley Co., IN (Ordovician of the United States)

Where: Ripley County, Indiana (41.0° N, 86.7° W: paleocoordinates 23.4° S, 58.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Liberty Formation, Richmond (449.5 - 445.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; shelly/skeletal, gray, argillaceous limestone and shale

• more limestones than in the waynesville; these limestones are less argillaceous, more crystalline, and contain smalll, distinctive orange splotches

Preservation: replaced with calcite

Collection methods: Collection methods: The creek bed at the base of the section was used as a datum plane and the section was divided into 15 five-foot zones and an upper 3 ft. zone, with a collection taken from each zone.

Primary reference: D. E. Von Tress. 1954. Some Waynesville and Liberty Bryozoa from Versailles, Ripley County, Indiana. unpublished M.A. thesis, Indiana University 1-62 [A. Miller/K. Layou] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6910: authorized by Arnold Miller, entered by Karen Layou on 10.04.2000