USGS 25199 [Myrtle Fm]: Hauterivian, Oregon
collected by Imlay 1954
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Phylloceratida
- Phylloceratidae
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Phyllopachyceras umpquanum
(Anderson 1938)
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Cephalopoda
- Ammonitida
- Crioceratitidae
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Crioceratites sp.
Leveillé 1837
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Cephalopoda
- Ammonitida
- Neocomitidae
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Hannaites riddlensis
(Anderson 1938)
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Cephalopoda
- Ammonitida
- Polyptychitidae
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Wellsia oregonensis
(Anderson 1938)
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| recombined as Homolsomites oregonensis | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Oregon | County: | Douglas |
| Coordinates: | 43.3° North, 123.2° West (view map) | ||||
| Paleocoordinates: | 42.1° North, 71.8° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
| Stage: | Hauterivian | 10 m.y. bin: | Cretaceous 2 |
| Key time interval: | Hauterivian | ||
| Age range of interval: | 132.60000 - 125.77000 m.y. ago |
Stratigraphy
| Formation: | Myrtle | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Myrtle Fm. AGE: Hauterivian, on the basis of macrofossil biostratigraphy. STRATIGRAPHIC POSITION: From 504 ft above 3rd conglomerate in local section. | |||||
Lithology and environment
| Primary lithology: | lithified "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Not stated, but probably siliciclastic. LITHIFICATION: Lithified on the basis of figured specimens. | |
| Environment: | marine indet. |
| Geology comments: ENVIRONMENT: Not stated in text. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils | ||
| Collection methods: | surface (in situ),field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | Imlay | Collection dates: | 1954 |
| Collection method comments: COLLECTORS: Imlay, Dole, and Peck, 1954. REPOSITORY: USNM, Washington DC. | |||
| Taxonomic list comments:COVERAGE: Exhaustive for ammonoidea. Other taxonomic groups may be present but are not listed. NOMENCLATURE: Authoritative publication, with fairly modern nomenclature, and species-resolution identifications. | |||
Metadata
| Also known as: | Sta. 10F | ||
| Database number: | 83577 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-08-22 11:35:37 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-08-22 11:35:37 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 28036. | R. W. Imlay. 1960. Ammonites of Early Cretaceous age (Valanginian and Hauterivian) from the Pacific Coast states. United States Geological Survey Professional Paper 334(F):1-228 [A. Hendy/A. Hendy] |