Where: Lewis County, Washington (46.4° N, 122.9° W: paleocoordinates 47.3° N, 109.4° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: NP16-NP17 nannofossil zone, Cowlitz Formation, Bartonian (41.3 - 38.0 Ma)
• LITHOSTRATIGRAPHY: From the Cowlitz Formation, for which lithostratigraphic relationships are not discussed. AGE: 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. STRATIGRAPHIC POSITION: From unknown position within formation.
• bed-level stratigraphic resolution
Environment/lithology: offshore; unlithified sandstone
Size class: mesofossils
Reposited in the UMMP
Collection methods: surface (float), surface (in situ),
• COLLECTORS: Unknown. REPOSTORY: Museum of Paleontology, University of California (UCMP).
Primary reference: V. A. Zullo. 1966. A new species of Balanus (Cirripedia, Thoracica) from the Late Eocene Cowlitz Formation of southern Washington, U.S.A. Crustaceana 11(2):198-204 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 160105: authorized by Austin Hendy, entered by Austin Hendy on 14.08.2014, edited by Patricia Holroyd
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Cantharus (Eocantharus) cowlitzensis n. sp. Clark 1938 true whelk | |
Thecostraca | |
"Balanus (Hesperibalanus) cornwalli" = Solidobalanus (Hesperibalanus) cornwalli
"Balanus (Hesperibalanus) cornwalli" = Solidobalanus (Hesperibalanus) cornwalli Zullo 1966 barnacle |