USGS 5083-CO. From east side of Blackburn Memorial Bridge (Ordovician of the United States)

Where: Kentucky (38.0° N, 84.8° W: paleocoordinates 27.2° S, 63.3° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Curdsville Limestone Member (Lexington Limestone Formation), Turinian (460.9 - 449.5 Ma)

• Bed is 1 ft above contact with Tyrone Limestone

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; lithified, phosphatic, shelly/skeletal, sandy, cherty/siliceous grainstone and lithified, phosphatic, shelly/skeletal, sandy, cherty/siliceous packstone

• environmental call based on field notes of Holland and Patzkowsky

Size class: macrofossils

Preservation: original calcite, replaced with silica, replaced with phosphate

Reposited in the USNM

Primary reference: H. J. Howe. 1979. Middle and Late Ordovician plectambonitacean, rhynchonellacean, syntrophiacean, trimerellacean, and atrypacean brachiopods: descriptions and illustrations of 14 species of Ordovician brachiopods. United States Geological Survey Professional Paper 1066(C):C1-C17 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 184657: authorized by Pete Wagner, entered by Pete Wagner on 15.03.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Strophomenidae
Crinoidea
 Hybocrinida - Hybocrinidae
Hybocrinus tumidus1 Billings 1857 Sea lily
 Hybocrinida - Hybocystitidae
Hybocystites problematicus1 Wetherby 1880 Sea lily