Where: Lewis County, Washington (46.4° N, 123.0° W: paleocoordinates 47.3° N, 109.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Cowlitz Formation, Bartonian (41.3 - 38.0 Ma)
• 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 A.
• bed-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, brown sandstone and poorly lithified, bioturbated, medium-grained, sandy siltstone
Size class: macrofossils
Reposited in the UMMP
Collection methods: bulk,
• 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.
Primary reference: 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]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 52204: authorized by Austin Hendy, entered by Austin Hendy on 01.08.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium stramineum Gabb 1864 tusk shell | |
"Cadulus gabbi" = Cadulus (Platyschides) gabbi
"Cadulus gabbi" = Cadulus (Platyschides) gabbi Sharp and Pilsbry 1898 tusk shell | |
Gastropoda | |
Pyramidella vaderensis snail
Odostomia sp. Fleming 1817 snail | |
Homalopoma sp. Carpenter 1864 snail | |
Scaphander washingtonensis Tegland 1933 snail | |
Acrilla (Ferminoscila) berthiaumei Durham 1937 wentletrap | |
Naticidae indet., "Neverita globosa" = Neverita (Neverita) globosa, "Neverita reclusiana" = Glossaulax reclusiana, Polinices nuciformis, "Polinices hotsoni" = Polinices (Euspira) hotsoni, Sinum obliquum
Naticidae indet. Guilding 1834 moon snail
"Neverita globosa" = Neverita (Neverita) globosa Gabb 1869 moon snail
"Neverita reclusiana" = Glossaulax reclusiana Deshayes 1839 moon snail
Polinices nuciformis Gabb 1864 moon snail
"Polinices hotsoni" = Polinices (Euspira) hotsoni Weaver and Palmer 1922 moon snail
Sinum obliquum Gabb 1864 moon snail | |
Ectinochilus washingtonensis Clark and Palmer 1923 true conch | |
Neogastropoda indet. Thiele 1929 snail | |
Exilia dickersoni Weaver 1912 snail
Exilia clarki Bentson 1940 snail | |
Olivella mathewsonii Gabb 1864 olive snail | |
? Cancellaria sp. Lamarck 1799 snail | |
Buccinidae indet., "Latirus eocenica" = Cominella eocenica, "Siphonalia bicarinata" = Siphonalia (Nassicola) bicarinata, "Siphonalia sopenahensis" = Siphonalia (Nassicola) sopenahensis
Buccinidae indet. Rafinesque 1815 true whelk
"Latirus eocenica" = Cominella eocenica Weaver 1912 true whelk
"Siphonalia bicarinata" = Siphonalia (Nassicola) bicarinata Dickerson 1915 true whelk
"Siphonalia sopenahensis" = Siphonalia (Nassicola) sopenahensis Weaver 1912 true whelk | |
Whitneyella gabbi, "Whitneyella washingtoniana" = Perse washingtoniana
Whitneyella gabbi Dickerson 1917 snail
"Whitneyella washingtoniana" = Perse washingtoniana Weaver 1912 snail | |
Colwellia bretzi snail | |
Calorebama inornata Dickerson 1915 snail | |
Murex sopenahensis Weaver 1912 murex snail
Murex cowlitzensis Weaver 1912 murex snail
Urosalpinx hannibali Dickerson 1915 murex snail | |
? Drillia sp. Gray 1838 snail
Clavus fryei snail | |
Turridae indet., "Hemipleurotoma pluchra" = Gemmula
Turridae indet. Swainson 1840 turrid
"Hemipleurotoma pluchra" = Gemmula turrid | |
Turricula cowlitzensis snail | |
"Ficopsis cowlitzensis" = Priscoficus cowlitzensis
"Ficopsis cowlitzensis" = Priscoficus cowlitzensis Weaver 1912 fig shell | |
Cypraea sp. Linnaeus 1758 cowry | |
Cerithiopsis vaderensis snail
Cerithiopsis washingtoniana Dickerson 1915 snail | |
Calyptraea diegoana Conrad 1855 slipper shell | |
"Crepidula pileum" = Spirocrypta pileum
"Crepidula pileum" = Spirocrypta pileum Gabb 1864 snail | |
| |
Potamides packardi horn snail | |
Melanoides fettkei snail | |
"Eulima clarki" = Melanella (Melanella) clarki
"Eulima clarki" = Melanella (Melanella) clarki Dickerson 1917 snail | |
Bivalvia | |
Pandora washingtonensis Weaver 1916 clam | |
Thracia dilleri Dall 1898 clam | |
"Acanthocardia (Schedocardia) brewerii" = Schedocardia brewerii
"Acanthocardia (Schedocardia) brewerii" = Schedocardia brewerii Gabb 1864 cockle | |
Tellina cowlitzensis tellin clam
Tellina "sp. A" Linnaeus 1758 tellin clam
Tellina "sp. B" Linnaeus 1758 tellin clam | |
"Veneroida indet." = Veneroidei
"Veneroida indet." = Veneroidei Gray 1854 clam | |
Tivelina vaderensis Dickerson 1915 venus clam
Macrocallista sp. Meek 1876 venus clam
Pitar (Lamelliconcha) eocenica Weaver and Palmer 1922 venus clam
Pitar quadratus Gabb 1864 venus clam | |
"Spisula packardi" = Pseudocardium packardi
"Spisula packardi" = Pseudocardium packardi Dickerson 1917 clam | |
"Corbula dickersoni" = Corbula (Caryocorbula) dickersoni
"Corbula dickersoni" = Corbula (Caryocorbula) dickersoni Weaver and Palmer 1922 clam | |
Crassatella washingtoniana Weaver 1912 clam | |
"Venericardia clarki" = Venericardia (Pacificor) clarki
"Venericardia clarki" = Venericardia (Pacificor) clarki Weaver and Palmer 1922 clam | |
Myoida indet. Goldfuss 1820 clam | |
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata Gabb 1864 clam | |
Arcidae indet. Lamarck 1809 clam | |
| |
Pteria clarki Weaver and Palmer 1922 pearl oyster | |
"Mytilus dichotomus" = Brachidontes (Brachidontes) cooperi, Brachidontes (Brachidontes) cowlitzensis
"Mytilus dichotomus" = Brachidontes (Brachidontes) cooperi Moore 1983 mussel
Brachidontes (Brachidontes) cowlitzensis Weaver and Palmer 1922 mussel [entered as Brachydontes (Brachydontes) cowlitzensis]
| |
Nuculanidae indet. Adams and Adams 1858 pointed nut clam
Nuculana washingtoni pointed nut clam
Nuculana vaderensis pointed nut clam
Nuculana "sp. A" Link 1807 pointed nut clam | |
Yoldia (Portlandia) duprei Weaver and Palmer 1922 clam |