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

• member-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, shelly/skeletal, gray packstone and lithified, shelly/skeletal shale

• environmental call based on field notes of Holland and Patzkowsky

Size class: macrofossils

Preservation: original calcite

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 34559: authorized by Steven Holland, entered by Steven Holland on 09.09.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Proetida - Proetidae
"? Proetidella sp." = Decoroproetus
"? Proetidella sp." = Decoroproetus Pribyl 1946 trilobite
Ostracoda
 Palaeocopida -
Bivalvia
 Myalinida - Ambonychiidae
Allonychia flanaganensis Foerste 1914 clam
Ambonychia sp. Hall 1847 clam
 Nuculida - Praenuculidae
 Nuculida - Cardiolariidae
Gastropoda
 Trochonematoidea - Lophospiridae
cf. Loxoplocus sp. Fischer 1885 snail
Loxoplocus (Lophospira)
 Euomphalina - Platyceratidae
Cyclonema sp. Hall 1852 snail
Stenolaemata
 Trepostomida -
 Cystoporida -
 Cryptostomata - Ptilodictyonidae
 Cryptostomata - Escharoporidae
Graptodictya sp. Ulrich 1882
 Trepostomata - Heterotrypidae
Heterotrypa sp. Nicholson 1879
 Trepostomata - Halloporidae
 Trepostomata - Mesotrypidae
Mesotrypa sp. Ulrich 1893
 Trepostomata - Monticuliporidae
Homotrypa sp. Ulrich 1882
Atactoporella sp. Ulrich 1883
 Trepostomata - Trematoporidae
? Eridotrypa sp. Ulrich 1893
 Cystoporata -
Strophomenata
 Strophomenida - Rafinesquinidae
Rhynchonellata
 Atrypida - Anazygidae
Zygospira sp. Hall 1862
 Rhynchonellida - Orthorhynchulidae
 Orthida - Platystrophiidae
 Orthida - Plectorthidae
"Hebertella parkensis" = Hebertella parksensis
"Hebertella parkensis" = Hebertella parksensis Foerste 1909