Also known as UO 2550
Where: Lane County, Oregon (44.1° N, 123.1° W: paleocoordinates 44.4° N, 110.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Eugene Formation, Priabonian (38.0 - 33.9 Ma)
• Eugene Formation can be subdivided faunally: a lower unit correlating to the Keasey Fm, a middle unit correlating to the Gries Ranch Beds of WA, and a upper unit correlated with the Pittsburg Bluff Fm. Thickness of formation may be up to 15,000 feet, but probably around 5,000 feet. Most of the outcrops are scattered so it is difficult to estimate their relative stratigraphic placement
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified, tuffaceous, brown, gray, blue sandstone and tuffaceous, brown, gray, blue siltstone
Size class: macrofossils
Preservation: mold/impression, trace
Reposited in the CAS
Collection methods: quarrying,
• Collections held at University of Oregon, University of California, Californian Academy of Sciences (CAS), United States Geological Survey (USGS), and Stanford University (NP).
Primary reference: C. J. S. Hickman. 1969. The Oligocene marine molluscan fauna of the Eugene Formation in Oregon. University of Oregon Museum of Natural History Bulletin 16:1-112 [A. Miller/A. Hendy/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 38997: authorized by Austin Hendy, entered by Austin Hendy on 18.05.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Crepidula ungana Dall 1908 slipper shell | |
Polinices washingtonensis, "Neverita thomsonae" = Glossaulax reclusiana
Polinices washingtonensis Weaver 1916 moon snail
"Neverita thomsonae" = Glossaulax reclusiana Deshayes 1839 moon snail | |
"Molopophorus fishii" = Ancilla fishii
"Molopophorus fishii" = Ancilla fishii Gabb 1866 olive snail | |
Bruclarkia vokesi snail | |
Acteon parvum Dickerson 1917 snail | |
Bivalvia | |
Yoldia (Kalayoldia) oregona Shumard 1858 clam | |
"Thracia condoni" = Thracia (Cetothrax) condoni
"Thracia condoni" = Thracia (Cetothrax) condoni Dall 1909 clam | |
Diplodonta parilis Conrad 1848 clam | |
Pitar (Pitar) dalli Weaver 1916 venus clam | |
"Spisula eugenensis" = Mactromeris eugenensis
"Spisula eugenensis" = Mactromeris eugenensis Clark 1925 clam | |
Tellina eugenia Dall 1909 tellin clam | |
Modiolus eugenensis Clark 1925 mussel |