Coos Bay (Haynes Slough - Coaledo Formation) (Eocene of the United States)

Also known as Coaledo Formation (Haynes Slough), Coos Bay)

Where: Coos County, Oregon (43.5° N, 124.2° W: paleocoordinates 43.8° N, 112.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Member (Coaledo Formation), Late/Upper Eocene (37.2 - 33.9 Ma)

• The lower Coaledo member is predominantly sandy. Stratigraphically above the Hardy Coal bed

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, medium-grained, coarse, gray, blue sandstone

• Predominantly sandy. Blue-gray medium-to coarse-grained nodular sandstone, with some grit and intercalated fine-grained sandy shale 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 37870: authorized by Austin Hendy, entered by Austin Hendy on 25.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brief for mollusca, no other groups mentioned or listed
 Triphoroidea - Cerithiopsidae
Cerithiopsis sp. Hanley 1849 snail
 Stromboidea - Strombidae
Ectinochilus macilenta White 1889 true conch
Subspecies: Ectinochilus macilenta oregonensis