Twin Rivers, UCMP A3688 (Oligocene of the United States)
Where: Clallam County, Washington (48.2° N, 123.9° W: paleocoordinates 47.8° N, 115.0° W)
• coordinate based on nearby landmark
When: Twin Rivers Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)
Environment/lithology: marine; lithified shale
Size class: macrofossils
Primary reference: J. W. Durham. 1944. Megafaunal zones of the Oligocene of northwestern Washington. University of California Publications in Geological Sciences 27:101 -212 [P. Holroyd/E. Orzechowski]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 208158: authorized by Mark Uhen, entered by Mark Uhen on 22.03.2020
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Gastropoda | |
"Turritella blakeleyensis" = Turritella diversilineata blakeleyensis
"Turritella blakeleyensis" = Turritella diversilineata blakeleyensis Weaver 1912 turret shell | |
| Bivalvia | |
"Acila nelsoni" = Nucula (Acila) nelsoni
"Acila nelsoni" = Nucula (Acila) nelsoni Clark 1925 divaricate nutclam | |