ammonites
High Bridge (Ordovician of the United States)

Where: Jessamine County, Kentucky (37.8° N, 84.7° W: paleocoordinates 27.4° S, 63.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Tyrone Limestone Formation (High Bridge Group), Rocklandian (460.9 - 449.5 Ma)

• Tyrone Limestone

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; limestone

• nothing is said about the lithology of the Tyrone Ls. at this locality

Size class: macrofossils

Preservation: recrystallized, replaced with silica

Reposited in the USNM

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 87739: authorized by Björn Kröger, entered by Torsten Liebrecht on 23.03.2009, edited by Pete Wagner