Nuculana assemblage - Cowlitz Formation: Bartonian, Washington
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhynchonellata
- Terebratulida
- Cancellothyrididae
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Rhynchonella washingtoniana
Weaver 1912
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37 individuals | ||||||
| recombined as Terebratulina washingtoniana | |||||||
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Scaphopoda
- Dentaliida
- Dentaliidae
|
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Dentalium stramineum
Gabb 1864
|
12 individuals | ||||||
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Scaphopoda
- Gadilida
- Gadilidae
|
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Cadulus gabbi
Sharp and Pilsbry 1898
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10 individuals | ||||||
| recombined as Cadulus (Platyschides) gabbi | |||||||
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Bivalvia
- Arcida
- Glycymerididae
|
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Glycymeris sagittata
(Gabb 1864)
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6 individuals | ||||||
| recombined as Glycymerita sagittata | |||||||
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Bivalvia
- Cardiida
- Tellinidae
|
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Tellina informal sp. A
Linnaeus 1758
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26 individuals | ||||||
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Tellina informal sp. B
Linnaeus 1758
|
3 individuals | ||||||
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Bivalvia
- Cardiida
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Veneroida indet.
Gray 1854
|
2 individuals | ||||||
| spelled with current rank as Veneroidei | |||||||
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Bivalvia
- Cardiida
- Veneridae
|
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Pitar quadratus
(Gabb 1864)
|
49 individuals | ||||||
|
Pitar (Lamelliconcha) eocenica
Weaver and Palmer 1922
|
6 individuals | ||||||
|
Bivalvia
- Thraciida
- Thraciidae
|
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Thracia dilleri
Dall 1898
|
2 individuals | ||||||
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Bivalvia
- Pandorida
- Pandoridae
|
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Pandora washingtonensis
Weaver 1916
|
4 individuals | ||||||
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Bivalvia
- Nuculanida
- Nuculanidae
|
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Nuculanidae indet.
Adams and Adams 1858
|
38 individuals | ||||||
|
Nuculana washingtonensis
(Weaver 1916)
|
3 individuals | ||||||
| recombined as Nuculana (Saccella) washingtonensis | |||||||
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Nuculana vaderensis
|
17 individuals | ||||||
|
Nuculana informal sp. A
Link 1807
|
36 individuals | ||||||
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Nuculana informal sp. C
Link 1807
|
2 individuals | ||||||
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Gastropoda
- Opisthobranchia
- Cylichnidae
|
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Scaphander washingtonensis
Tegland 1933
|
39 individuals | ||||||
|
Gastropoda
- Heterostropha
- Pyramidellidae
|
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Pyramidella vaderensis
|
1 individual | ||||||
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Gastropoda
- Neritidae
|
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Nerita cowlitzensis
Dickerson 1915
|
1 individual | ||||||
| synonym of Nerita (Theliostyla) triangulata | |||||||
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Gastropoda
- Epitoniidae
|
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Acrilla (Ferminoscila) berthiaumei
Durham 1937
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1 individual | ||||||
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Gastropoda
- Naticidae
|
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Naticidae indet.
Guilding 1834
|
14 individuals | ||||||
|
Polinices nuciformis
(Gabb 1864)
|
25 individuals | ||||||
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Polinices hotsoni
Weaver and Palmer 1922
|
22 individuals | ||||||
| recombined as Polinices (Euspira) hotsoni | |||||||
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Neverita globosa
Gabb 1869
|
1 individual | ||||||
| recombined as Neverita (Neverita) globosa | |||||||
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Sinum obliquum
(Gabb 1864)
|
1 individual | ||||||
| original and current combination Naticina obliqua | |||||||
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Gastropoda
- Ficidae
|
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Ficopsis cowlitzensis
(Weaver 1912)
|
9 individuals | ||||||
| recombined as Priscoficus cowlitzensis | |||||||
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Gastropoda
- Cypraeidae
|
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|
Nucleolaria cowlitzensis
(Groves 1994)
|
1 individual | ||||||
| original and current combination Nucleolaria cowlitziana | |||||||
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Gastropoda
- Neogastropoda
|
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Neogastropoda indet.
Thiele 1929
|
10 individuals | ||||||
|
Gastropoda
- Neogastropoda
- Turbinellidae
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Fulgurofusus washingtoniana
|
2 individuals | ||||||
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Gastropoda
- Neogastropoda
- Ptychatractidae
|
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Exilia dickersoni
(Weaver 1912)
|
3 individuals | ||||||
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Gastropoda
- Neogastropoda
- Mitridae
|
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Mitra washingtoniana
Weaver 1912
|
2 individuals | ||||||
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Gastropoda
- Neogastropoda
- Buccinidae
|
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Siphonalia bicarinata
Dickerson 1915
|
1 individual | ||||||
| recombined as Siphonalia (Nassicola) bicarinata | |||||||
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Siphonalia sopenahensis
(Weaver 1912)
|
3 individuals | ||||||
| recombined as Siphonalia (Nassicola) sopenahensis | |||||||
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Gastropoda
- Neogastropoda
- Fasciolariidae
|
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Whitneyella gabbi
(Dickerson 1917)
|
1 individual | ||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
|
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Bonellitia (Admetula) paucivaricata
(Gabb 1864)
|
1 individual | ||||||
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Gastropoda
- Neogastropoda
- Turridae
|
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Turridae indet.
Swainson 1840
|
10 individuals | ||||||
|
Gemmula barksdalei
|
3 individuals | ||||||
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Gastropoda
- Neogastropoda
- Conidae
|
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Conus cowlitzensis
Weaver 1912
|
4 individuals | ||||||
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Conus weaveri
Dickerson 1915
|
1 individual | ||||||
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Conus vaderensis
Weaver and Palmer 1922
|
17 individuals | ||||||
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Gastropoda
- Neogastropoda
- Clavatulidae
|
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Turricula ornata
|
4 individuals | ||||||
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Turricula cowlitzensis
|
6 individuals | ||||||
|
Hemipleurotoma pulchra
(Dickerson 1915)
|
8 individuals | ||||||
| replaced by Surcula evermanni | |||||||
|
Nekewis washingtoniana
(Weaver 1912)
|
1 individual | ||||||
| recombined as Surcula washingtoniana | |||||||
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Gastropoda
- Neogastropoda
- Cystiscidae
|
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Persicula sp.
Schumacher 1817
|
30 individuals | ||||||
|
Gastropoda
- Neogastropoda
- Muricidae
|
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Urosalpinx hannibali
Dickerson 1915
|
1 individual | ||||||
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Gastropoda
- Strombidae
|
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Ectinochilus washingtonensis
(Clark and Palmer 1923)
|
1 individual | ||||||
|
Ectinochilus elongata
|
1 individual | ||||||
| synonym of Rimella | |||||||
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Gastropoda
- Cassidae
|
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Echinophoria trituberculata
(Weaver 1912)
|
1 individual | ||||||
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Gastropoda
- Bursidae
|
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Ranella washingtoniana
Weaver 1912
|
3 individuals | ||||||
| recombined as Bursa washingtoniana | |||||||
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Gastropoda
- Neotaenioglossa
- Trichotropidae
|
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Crepidula pileum
(Gabb 1864)
|
15 individuals | ||||||
| recombined as Spirocrypta pileum | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Washington | County: | Lewis |
| Coordinates: | 46.4° North, 123.0° West (view map) | ||||
| Paleocoordinates: | 47.3° North, 109.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Bartonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Bartonian | ||
| Age range of interval: | 41.20000 - 37.71000 m.y. ago |
Stratigraphy
| Formation: | Cowlitz | ||||
| Local section: | Big Bend | Local bed: | R | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Calcareous nannoplankton most precisely age this unit, placing the Cowlitz fauna in nannoplankton zones NP16 and NP17 (Martini, 1971) and upper CP14 (Oklada and Bukry, 1980), which correlates to the late middle Eocene (40-43 Ma) age (Berggren et al., 1992). Molluscan biostratigraphy suggests a "Tejon" stage age or "Cowlitz-Coaldeo" molluscan stage = Middle Eocene. Collection is assigned to the Bartonian=late Middle Eocene. Collection is from stratigraphic unit E. | |||||
Lithology and environment
| Primary lithology: | bioturbation,glauconitic poorly lithified argillaceous,carbonaceous siltstone |
| Includes fossils? | Y |
| Lithology description: Highly bioturbated, clay-rich siltstone, with an abundance of fine carbon flakes and glauconite pellets. In general outcrop sare mottled gray-green in color, highly bioturbated, poorly consolidated, and deeply weathered. | |
| Environment: | deep-water indet. |
| Geology comments: Middle-upper bathyal environment. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Articulated whole bodies: | many |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Collection size: | 563 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Museum repositories: | UMMP |
| Collection method comments: Collection is presumably reposited in the Museum of Paleontology, University of California collections. Collected in July of 1978 and 1979. Locality has been and continues to be obscured following the May 1980 Mount St Helen's eruption and subsequent landslides and log jams. | |
| Taxonomic list comments:Identified by E. Nesbitt, based on figures and descriptions in Dickerson (1914, 1915), and Weaver (1943), and Squires (1984, 1989), and there are anumber of new, undescribed species. Specimen counts are based on the greater number of left and right valves for bivalves. | |
Metadata
| Database number: | 52205 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2005-08-01 08:40:56 | Last modified: | 2019-04-23 16:28:54 |
| Access level: | the public | Released: | 2005-08-01 08:40:56 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 14035. | E. A. Nesbitt. 1995. Paleoecological anlaysis of molluscan assemblages from the Middle Eocene Cowlitz Formation, southwestern Washington. Journal of Paleontology 69(6):1060-1073 [A. Miller/A. Hendy/A. Hendy] |
Secondary references:
| 18061 | E. A. Nesbitt. 2018. Cenozoic Marine Formations of Washington and Oregon: an annotated catalogue. PaleoBios 35:1-20 [M. Uhen/M. Uhen/M. Uhen] |