USGS 7310-CO. southeast of Winchester (Ordovician of the United States)

Where: Clark County, Kentucky (38.0° N, 84.1° W: paleocoordinates 27.6° S, 62.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Strodes Creek Member (Lexington Limestone Formation), Shermanian (457.3 - 449.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lime mudstone and reef rocks

• The Strodes Creek Member "consists of up to 30 ft of 'bouldery' gray, micrograined limestone and characteristically abundant, large stromatoporoids. Black and Cuppels (1973) inferred low-energy, quiet-water, mud-bottom marine conditions for the Strodes Creek Member and development of local stromatoporoid biostromes. These biostromes provided a habitat for a diverse fauna of orthid and rhynchonellid brachiopods, bryozoans, the coral Favistina, pelecypods, univalved mollusks, nautiloids, trilobites, and ostracodes."

Size class: macrofossils

Preservation: mold/impression, recrystallized, replaced with calcite

Reposited in the USNM

Primary reference: R. C. Frey. 1995. Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati Arch region of Kentucky, Indiana, and Ohio. U.S. Geological Survey Professional Paper 1066P:1-126 [S. Holland/S. Holland]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87830: authorized by Björn Kröger, entered by Torsten Liebrecht on 26.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• see comments on lithology
Show authors, comments, and common names
Cephalopoda
 Orthocerida - Kionoceratidae
Polygrammoceras sp.
Polygrammoceras sp. Foerste 1927
"Polygrammoceras cf. P. sp. A"; USNM 468694