Also known as Locality #50 (Moore, 1963); USGS 16049

Where: Tillamook County, Oregon (45.2° N, 124.0° W: paleocoordinates 45.0° N, 118.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Middle Shale Member (Astoria Formation), Burdigalian to Burdigalian (20.4 - 13.8 Ma)

• From concretionary sandstone approx. 20 ft above the base of the Astoria Formation. Astoria Formation has been used as a name for almost all of the marine middle Miocene sedimentary rocks of Washington and Oregon although these correlations are poorly constrained. The formation has been divided into three members: a lower sandstone, a shale, and an upper sandstone. These rocks form the northern limb of a syncline, the asis of which is exposed east of Astoria, and the syncline trends NE and plunges to the SW. The Astoria Formation is intermittently exposed; theya re faulted and exposures are interupted by volcanic rocks and slides. The maximum thickness of any exposure is 25 feet.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, concretionary sandstone

Size class: macrofossils

Preservation: concretion, replaced with other

Reposited in the CAS, USNM

Collection methods: salvage, quarrying, surface (float),

• Collected by P.D. Snavely, 1946. Collections reside in the Californian Academy of Sciences, the U.S. National Museum, and presumably the USGS.

Primary reference: E. J. Moore. 1963. Miocene marine mollusks from the Astoria Formation in Oregon. United States Geological Survey Professional Paper 419 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39592: authorized by Austin Hendy, entered by Austin Hendy on 31.05.2004

Creative Commons license: CC BY (attribution)