Lane county [Eugene Formation] (Eocene to of the United States)

Where: Lane County, Oregon (44.1° N, 123.1° W: paleocoordinates 44.7° N, 110.2° W)

• coordinate based on nearby landmark

• basin-level geographic resolution

When: Eugene Formation, Bartonian to Bartonian (41.3 - 33.9 Ma)

• Consists of at least four thousand feet of easterly-dipping sediments. Originally listed as Oligocene. Most recent biostratigraphic work indicates this is Late Eocene in age (McKillip, 1992)

• formation-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, fine-grained, coarse, tuffaceous, shelly/skeletal, gray, blue sandstone

• Heavy bedded blue-gray fine-to-coarse grained fossiliferous tuffaceous sandstone, with sandy shales and some conglomerates; interbedded and intrusive basalt; fine-graiend tuff containing leaves; black coarse grained sandstone; laminated fine-grained clay-shale; conglomeratic sandstone.

Size class: macrofossils

Collection methods: No collection details provided

Primary reference: W. D. Smith and L.L. Ruff. 1938. The Geology and Mineral Resources of Lane County, Oregon. State of Oregon Department of Geology and Mineral Industries Bulletin 11:1-65 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37989: authorized by Austin Hendy, entered by Austin Hendy on 30.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Definitely not an exhaustive list. Only includes some mollusca, no other groups mentioned.
Bivalvia
 Cardiida - Mactridae
"Mulinia eugenensis" = Mactromeris eugenensis, "Spisula ramonensis" = Mactromeris ramonensis
"Mulinia eugenensis" = Mactromeris eugenensis Clark 1925 clam
"Spisula ramonensis" = Mactromeris ramonensis Packard and Clark 1915 clam
 Cardiida - Tellinidae
Tellina eugenia Dall 1909 tellin clam
 Solenida - Solenidae
"Solen curtus" = Solena (Plectosolen) conradi Dall 1900 clam
Gastropoda
 Ptenoglossa - Epitoniidae
"Epitonium condoni" = Epitonium (Boreoscala) condoni
"Epitonium condoni" = Epitonium (Boreoscala) condoni Dall 1909 wentletrap
 Neogastropoda - Buccinidae
Agasoma gravidum true whelk
Cephalopoda
 Nautilida - Aturiidae
Aturia angustata Conrad 1849 nautiloid