USGS 7471-CO. West of Sadieville (Ordovician of the United States)

Where: Scott County, Kentucky (38.4° N, 84.5° W: paleocoordinates 27.1° S, 62.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Clays Ferry Formation, Edenian (451.0 - 450.2 Ma)

• "Edenian part of the Clays Ferry Formation" [...] "Clays Ferry Formation. [...] 97 ft above base."

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; tabular packstone and shale

• " [...] deposited at the northward-sloping northern edge of the platform in deeper water, low-energy, mud-bottom environments. Water depths in these environments were estimated by Cressman (1973) to have exceeded 80 ft (24 m), below fair-weather wave base, but within the zone of storm-current reworking."
• "thin-bedded, planar packstones and clay shales [...]. Biotas [...] are most common in the thin wackestone or packstone beds and consist of small dalmanellid and plectambonitid brachiopods, bryozoans, small pelecypods, gastropods, monoplacophorans, nautiloids, trilobites, ostracodes, and crinoids."

Size class: macrofossils

Preservation: mold/impression

Reposited in the USNM

Collection methods: bulk,

• " [...] specimens were obtained from bulk rock collections (36,000 pounds (lbs) of limestone) made by USGS field parties in the 1960's and 1970's." This statement not only applies to the Sadieville locality. For further details on collection methods see p. P22 in the primary reference

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 87842: 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 - Proteoceratidae
Treptoceras duseri
Treptoceras duseri Hall and Whitfield 1875
USNM 468719