Curdsville Mbr., Lexington Limestone, Kentucky (Ordovician of the United States)

Where: Kentucky (38.0° N, 84.7° W: paleocoordinates 27.3° S, 63.2° W)

• coordinate estimated from map

• basin-level geographic resolution

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

• member-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: E. R. Cressman. 1973. Lithostratigraphy and depositional environments of the Lexington Limestone (Ordovician) of central Kentucky. USGS Professional Paper 768:1-61 [M. Patzkowsky/M. Patzkowsky/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 34545: authorized by Steven Holland, entered by Steven Holland on 09.09.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Pterygometopidae
 Proetida - Bathyuridae
"Raymondites cf. ingalli" = Bathyurus (Raymondites) ingalli
"Raymondites cf. ingalli" = Bathyurus (Raymondites) ingalli Raymond 1913 trilobite
Bivalvia
 Cyrtodontida - Cyrtodontidae
Vanuxemia sp. Billings 1858 clam
Gastropoda
 Trochonematoidea - Lophospiridae
Loxoplocus sp. Fischer 1885 snail
Loxoplocus (Lophospira)
 Bellerophontida - Tropidodiscidae
Tropidodiscus sp. Meek and Worthen 1866 snail
 Murchisoniina - Eotomariidae
Liospira sp. Ulrich and Scofield 1897 snail
Strophomenata
 Strophomenida - Sowerbyellidae
 Strophomenida - Rafinesquinidae
Rafinesquina sp. Hall and Clarke 1892
Rhynchonellata
 Pentamerida - Camerellidae
 Atrypida - Anazygidae
Zygospira sp. Hall 1862
 Rhynchonellida - Rhynchotrematidae
 Orthida - Dalmanellidae
Dalmanella sp. Hall and Clarke 1892
Dalmanella fertilis Ulrich 1909
 Orthida - Hesperorthidae
 Orthida - Platystrophiidae