Pysht (M6375): Early/Lower Miocene, Washington
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Turritella oregonensis
(Conrad 1849)
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Gastropoda
- Naticidae
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Sinum scopulosum
(Conrad 1849)
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| recombined as Sinum scopulosus | |||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Cancellaria wynoocheensis
(Weaver 1916)
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| original and current combination Cancellaria wynootchensis | |||||||
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Bivalvia
- Nuculanida
- Nuculanidae
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Nuculana cf. elmana
Etherington 1931
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Bivalvia
- Cardiida
- Tellinidae
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Macoma albaria
(Conrad 1849)
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Bivalvia
- Cardiida
- Veneridae
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Katherinella angustiformis
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Bivalvia
- Thraciida
- Thraciidae
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Thracia trapezoides
Conrad 1849
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| recombined as Thracia (Homoeodesma) trapezoides | |||||||
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Bivalvia
- Carditida
- Carditidae
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Cyclocardia subtenta
(Conrad 1849)
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Washington | County: | Clallam |
| Coordinates: | 48.2° North, 122.1° West (view map) | ||||
| Paleocoordinates: | 48.0° North, 115.5° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early/Lower Miocene | ||
| Age range of interval: | 23.03000 - 15.98000 m.y. ago |
Stratigraphy
| Formation: | Clallam | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The Clallam Formation is a predominantly marine sandstone with minor conglomerate and siltstone exposed along the Strait of Juan de Fuca in northwestern Washington. Marine molluscs occur throughout the 600 to 800 m thick formation but are especially abundant in the lowermost 240 m. Pillarian Stage afe, a provincial time stratigraphic unit of late early Miocene age. | |||||
Lithology and environment
| Primary lithology: | lithified silty sandstone |
| Includes fossils? | Y |
| Lithology description: Sandstone with minor conglomerate and siltstone. | |
| Environment: | offshore |
| Glacial or sequence phase: | regressive |
| Geology comments: All Clallam Formation assemblages represent inner sublittoral depths (less than about 100 m). Qualitative analysis of these assemblages indicates a gradual shallowing during deposition of the formation. The highest strata in the formation contain coal and are presumably non-marine. | |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | UW |
| Collection method comments: Collections held at USGS, Menlo Park; Washington University, Seattle; Stanford University | |
| Taxonomic list comments:Only molluscan taxa listed. | |
Metadata
| Also known as: | USGS M6375 | ||
| Database number: | 37573 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-03-17 05:59:40 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | group members | Released: | 2005-03-17 05:59:40 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 10046. | W.O. Addicott. 1976. Molluscan paleontology of the lower Miocene Clallam Formation, northwestern Washington. United States Geological Survey Professional Paper 976:1-44 [A. Miller/A. Hendy/A. Hendy] |