USGS 6131-CO. Route 33 crossing Mocks Branch (Ordovician of the United States)

Where: Boyle County, Kentucky (37.7° N, 84.8° W: paleocoordinates 27.5° S, 63.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• "23 ft above Tyrone Limestone-Lexington Limestone contact."

•Near top of member.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, shelly/skeletal, gray limestone

• "The upper unit consists of medium-gray, irregularly bedded, fossiliferous limestone and bioclaastic calcarenite."

Size class: macrofossils

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 100176: authorized by Pete Wagner, entered by Hallie Street on 01.12.2010, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Cyrtodontida - Cyrtodontidae
 Protobranchia - Ctenodontidae
Ctenodonta cf. nasuta1 Hall 1847 clam
Tancrediopsis cuneata1 Hall 1856 clam
 Nuculida - Praenuculidae
Gastropoda
 Trochonematoidea - Lophospiridae
Lophospira milleri4 Miller 1877 snail
 Bellerophontida - Bellerophontidae
Sphenosphaera troosti de Ferrusac and d'Orbigny 1840 snail
 Bellerophontida - Plectonotidae
Tetranota obsoleta Ulrich and Scofield 1897 snail
 Bellerophontida - Bucaniidae
Salpingostoma kentuckyense Ulrich and Scofield 1897 snail
Polyplacophora
 Neoloricata - Lepidopleuridae
Crinoidea
 Porocrinida -
? Carabocrinus "plate"3 Billings 1857 Sea lily
Strophomenata
 Strophomenida - Sowerbyellidae