USGS 6411-CO. U.S. Route 27, 0.1 miles northeast of crossing of Dix River (Ordovician of the United States)

Where: Lincoln County, Kentucky (37.6° N, 84.6° W: paleocoordinates 27.4° S, 61.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Amorphognathus superbus conodont zone, Gilbert Member (Ashlock Formation), Maysvillian (452.0 - 449.5 Ma)

• Section no. 21B

• bed-level stratigraphic resolution

Environment/lithology: lagoonal; fine-grained, medium, gray, green, blue limestone

• shallow, quiet lagoons
• bluish- to olive-gray, fine- to medium-grained limestone occurring in thin wavy beds

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Primary reference: G.P. Wahlman. 1992. Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. United States Geological Survey Professional Paper 1066(O):1-123 [P. Wagner/P. Wagner/E. Ito]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 76970: authorized by Pete Wagner, entered by Pete Wagner on 11.12.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Rhynchonellida - Orthorhynchulidae
 Orthida - Platystrophiidae
Gastropoda
 Bellerophontida - Bellerophontidae
Sphenosphaera capax Ulrich and Scofield 1897 snail
Cyclocystoidea
  - Cyclocystoididae
Cyclocystoides sp.3 Salter and Billings 1858