Coos Bay (Fourmile Creek - Umpqua Formation) (Eocene of the United States)

Also known as Umpqua Formation (Fourmile Creek, Coos Bay)

Where: Coos County, Oregon (43.0° N, 124.5° W: paleocoordinates 47.0° N, 105.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Umpqua Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

• Umpqua Formation overlies pre-Tertiary strata with depositional contacts. About 2000 ft of dark tuffaceous shale containing an abundant fauna is exposed in the creek bed.

• bed-level stratigraphic resolution

Environment/lithology: coastal; tuffaceous, sandy shale

• Thin bedded dark tuffaceous sandy shales with intercalated flaggy sandstone beds.

Size class: macrofossils

Collection methods: quarrying,

Primary reference: J. E. Allen and E.M. Baldwin. 1944. Geology and coal resources of the Coos Bay Quadrangle, Oregon. State of Oregon Department of Geology and Mineral Industries Bulletin 27:1-160 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37876: authorized by Austin Hendy, entered by Austin Hendy on 25.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Reresentative for mollusca, no other groups mentioned or listed