Eugene East (UO 2553) - #28 (Hickman) (Eocene of the United States)

Also known as UO 2553

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

• Tuffaceous and highly feldspathic sandstone or siltstone which is bluish-gray to olive when fresh and weathers to a buff or orange-brown color. Gray sandstone and siltstone beds may range from several to 50 feet in thickness and are interbedded with minor amounts of sandy sahel and clay shale, occasional beds of conglomerate, and thin lenses of gray or buff-colored volcanic ash

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 39003: authorized by Austin Hendy, entered by Austin Hendy on 18.05.2004, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for mollusca
Scaphopoda
 Dentaliida - Dentaliidae
Bivalvia
 Nuculida - Nuculidae
"Acila (Truncacila) nehalemensis" = Acila nehalemensis
"Acila (Truncacila) nehalemensis" = Acila nehalemensis Hanna 1924 divaricate nutclam
Subspecies: Acila (Truncacila) nehalemensis minima
 Nuculanida - Nuculanidae
"Nuculana washingtonensis" = Nuculana (Saccella) washingtonensis
"Nuculana washingtonensis" = Nuculana (Saccella) washingtonensis Weaver 1916 pointed nut clam
 Nuculanida - Yoldiidae
Yoldia (Kalayoldia) oregona Shumard 1858 clam
 Mytilida - Mytilidae
Modiolus eugenensis Clark 1925 mussel
 Thraciida - Thraciidae
"Thracia condoni" = Thracia (Cetothrax) condoni
"Thracia condoni" = Thracia (Cetothrax) condoni Dall 1909 clam
 Solenida - Solenidae
Solen sicarius Gould 1850 clam
 Pholadida - Myidae
Mya (? Arenomya) kusiroensis Nagao and Inoue 1941 softshell clam
 Pholadida - Pholadidae
Martesia sp. Sowerby 1824 clam
 Cardiida - Cardiidae
Parvicardium eugenense Clark 1925 cockle
 Cardiida - Semelidae
Semele willamettensis Hickman 1969 clam
 Cardiida - Tellinidae
"Macoma aff. inquinata" = Macoma (Macoma) inquinata Deshayes 1855 tellin clam
Tellina aduncanasa tellin clam
Tellina sp. n. sp. Linnaeus 1758 tellin clam
Tellina (Moerella) lincolnensis Weaver 1916 tellin clam
Tellina pittsburgensis Clark 1925 tellin clam
 Cardiida - Veneridae
"Pitar (Lamelliconcha) clarki" = Lamelliconcha clarki, Pitar (Pitar) sp. n. sp., Pitar (Pitar) dalli, Macrocallista sp. n. sp.
"Pitar (Lamelliconcha) clarki" = Lamelliconcha clarki Dickerson 1917 venus clam
Pitar (Pitar) sp. n. sp. Römer 1857 venus clam
Pitar (Pitar) dalli Weaver 1916 venus clam
Macrocallista sp. n. sp. Meek 1876 venus clam
 Cardiida - Mactridae
"Spisula eugenensis" = Mactromeris eugenensis, Pseudocardium sp. n. sp.
"Spisula eugenensis" = Mactromeris eugenensis Clark 1925 clam
Pseudocardium sp. n. sp. Gabb 1866 clam
 Cardiida - Ungulinidae
Diplodonta parilis Conrad 1848 clam
Gastropoda
 Epitonioidea - Epitoniidae
Epitonium (Boreoscala) condoni Dall 1909 wentletrap
Subspecies: Epitonium (Boreoscala) condoni condoni
Acrilla (Ferminoscala) dickersoni Durham 1937 wentletrap
Acrilla (Ferminoscala) becki Durham 1937 wentletrap
 Sorbeoconcha - Naticidae
Natica thomsonae moon snail
Natica (Natica) sp. n. sp. Scopoli 1777 moon snail
Sinum obliquum Gabb 1864 moon snail
Polinices washingtonensis Weaver 1916 moon snail
 Sorbeoconcha - Bursidae
Olequahia schencki Durham 1944 frog shell
 Sorbeoconcha - Ficidae
Ficus modesta Conrad 1848 fig shell
 Neogastropoda - Olividae
"Molopophorus fishii" = Ancilla fishii
"Molopophorus fishii" = Ancilla fishii Gabb 1866 olive snail
 Neogastropoda - Turridae
Procerapex bentsonae Durham 1944 turrid
Gemmula bentsonae Durham 1944 turrid
 Neogastropoda - Ptychatractidae
Exilia lincolnensis Weaver 1916 snail
 Neogastropoda - Melongenidae
"Perse lincolnensis" = Hemifusus lincolnensis
"Perse lincolnensis" = Hemifusus lincolnensis Van Winkle 1918 snail
 Neogastropoda - Siphonaliidae
Bruclarkia vokesi, "Bruclarkia columbianum" = Bruclarkia columbiana
"Bruclarkia columbianum" = Bruclarkia columbiana Anderson and Martin 1914 snail
 Neotaenioglossa - Calyptraeidae
Crepidula ungana Dall 1908 slipper shell
Calyptraea diegoana Conrad 1855 slipper shell
 Opisthobranchia - Retusidae
Cylichnina turneri Effinger 1938 snail
 Opisthobranchia - Cylichnidae
Scaphander stewarti Durham 1944 snail