USGS 7471-CO. West of Sadieville: Edenian, Kentucky
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Orthocerida
- Proteoceratidae
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Treptoceras duseri
(Hall and Whitfield 1875)
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1 specimen | |||||||||
| USNM 468719 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Kentucky | County: | Scott |
| Coordinates: | 38.4° North, 84.5° West (view map) | ||||
| Paleocoordinates: | 27.1° South, 62.8° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| Key time interval: | Edenian | ||
| Age range of interval: | 451.10000 - 450.40000 m.y. ago |
Stratigraphy
| Formation: | Clays Ferry | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "Edenian part of the Clays Ferry Formation" [...] "Clays Ferry Formation. [...] 97 ft above base." | |||||
Lithology and environment
| Primary lithology: | tabular packstone | ||
| Secondary lithology: | "shale" | ||
| Lithology description: "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." | |||
| Environment: | deep subtidal shelf | Tectonic setting: | foreland basin |
| Geology comments: " [...] 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." | |||
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection excludes: | some macrofossils,difficult macrofossils |
| Collection methods: | bulk,survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collection method comments: " [...] 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 | |
| Taxonomic list comments:see comments on lithology | |
Metadata
| Database number: | 87842 | ||
| Authorizer: | B. Kröger | Enterer: | T. Liebrecht |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2009-03-26 09:10:33 | Last modified: | 2017-03-14 21:44:06 |
| Access level: | the public | Released: | 2009-03-26 09:10:33 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 24575. | 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] |