Turritella-Solena assemblage - Cowlitz Formation: Bartonian, Washington
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Turritella uvasana
Conrad 1855
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22 individuals | |||||||||
| Subspecies: Turritella uvasana stewarti | ||||||||||
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Gastropoda
- Naticidae
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Naticidae indet.
Guilding 1834
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5 individuals | |||||||||
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Polinices hotsoni
Weaver and Palmer 1922
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2 individuals | |||||||||
| recombined as Polinices (Euspira) hotsoni | ||||||||||
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Gastropoda
- Neogastropoda
- Nassariidae
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Colwellia sp.
Nuttall and Cooper 1973
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3 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Fusinus (Priscofusus) sp.
(Conrad 1865)
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1 individual | |||||||||
| original and current combination Priscofusus | ||||||||||
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Whitneyella markleyensis
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1 individual | |||||||||
| synonym of Perse | ||||||||||
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? Whitneyella sp.
Stewart 1927
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4 individuals | |||||||||
| synonym of Perse | ||||||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Siphonalia bicarinata
Dickerson 1915
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3 individuals | |||||||||
| recombined as Siphonalia (Nassicola) bicarinata | ||||||||||
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Siphonalia sopenahensis
(Weaver 1912)
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1 individual | |||||||||
| recombined as Siphonalia (Nassicola) sopenahensis | ||||||||||
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Latirus eocenica
(Weaver 1912)
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1 individual | |||||||||
| original and current combination Nassa eocenica | ||||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea diegoana
(Conrad 1855)
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5 individuals | |||||||||
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Gastropoda
- Epitoniidae
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Epitonium informal sp. A
Bolten 1798
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1 individual | |||||||||
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Gastropoda
- Trochidae
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Trochidae indet.
Rafinesque 1815
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1 individual | |||||||||
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Bivalvia
- Nuculanida
- Nuculanidae
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Nuculana washingtonensis
(Weaver 1916)
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3 individuals | |||||||||
| recombined as Nuculana (Saccella) washingtonensis | ||||||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia clarki
Weaver and Palmer 1922
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14 individuals | |||||||||
| recombined as Venericardia (Pacificor) clarki | ||||||||||
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Bivalvia
- Poromyida
- Cuspidariidae
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? Cardiomya sp.
Adams 1864
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1 individual | |||||||||
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Bivalvia
- Thraciida
- Thraciidae
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Thracia dilleri
Dall 1898
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3 individuals | |||||||||
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Bivalvia
- Cardiida
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Veneroida indet.
Gray 1854
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14 individuals | |||||||||
| spelled with current rank as Veneroidei | ||||||||||
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Bivalvia
- Cardiida
- Veneridae
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Tivelina vaderensis
(Dickerson 1915)
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10 individuals | |||||||||
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Pitar californiana
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12 individuals | |||||||||
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Pitar (Lamelliconcha) eocenica
Weaver and Palmer 1922
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46 individuals | |||||||||
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Bivalvia
- Cardiida
- Tellinidae
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Tellina cowlitzensis
|
1 individual | |||||||||
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Bivalvia
- Cardiida
- Psammobiidae
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Gari cowlitzensis
(Weaver and Palmer 1922)
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10 individuals | |||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Acanthocardia (Schedocardia) brewerii
(Gabb 1864)
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8 individuals | |||||||||
| recombined as Schedocardia brewerii | ||||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula parilis
Gabb 1864
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13 individuals | |||||||||
| recombined as Caryocorbula parilis | ||||||||||
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Bivalvia
- Solenida
- Solenidae
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Solena columbina
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10 individuals | |||||||||
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Solena clarki
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1 individual | |||||||||
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Bivalvia
- Myoida
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Myoida indet.
Goldfuss 1820
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1 individual | |||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Septifer dichotomus
Gabb 1864
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2 individuals | |||||||||
| recombined as Brachidontes (Brachidontes) dichotomus | ||||||||||
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Brachidontes (Brachydontes) cowlitzensis
(Weaver and Palmer 1922)
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1 individual | |||||||||
| [entered as Brachydontes (Brachydontes) cowlitzensis] | ||||||||||
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Mytilus dichotomus
Cooper 1894
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1 individual | |||||||||
| replaced by Brachidontes (Brachidontes) cooperi | ||||||||||
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Bivalvia
- Ostreida
- Pteriidae
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Pteria clarki
Weaver and Palmer 1922
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10 individuals | |||||||||
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Bivalvia
- Arcida
- Arcidae
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Barbatia (Obliquarca) landesi
(Weaver and Palmer 1922)
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1 individual | |||||||||
| 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 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 about 15m and 30m above Acutostrea assemblage. | |||||
Lithology and environment
| Primary lithology: | medium,shelly/skeletal,green lithified sandstone |
| Includes fossils? | Y |
| Lithology description: Densely fossiliferous sandstone; dark-green, medium-grained, basalt-lithic fragments | |
| Environment: | transition zone/lower shoreface |
| Geology comments: Sandy, inner-neritic environment, shallower than 50 m, not indicative of brackish water. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
| Articulated whole bodies: | some |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Collection size: | 208 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. Collection is more or less equivalent to Weaver's (1937) localities UW 342 and 34. | |
| 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: | 52207 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2005-08-01 08:58:53 | Last modified: | 2019-04-23 16:29:27 |
| Access level: | the public | Released: | 2005-08-01 08:58:53 |
| 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] |