Also known as Locality #11 (Moore, 1963); USGS 19069
Where: Clatsop County, Oregon (46.2° N, 123.8° W: paleocoordinates 46.0° N, 118.2° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Middle Shale Member (Astoria Formation), Burdigalian to Burdigalian (20.4 - 13.8 Ma)
• Middle Shale Member, less than 100 ft thick. 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, tuffaceous, sandy shale
Size class: macrofossils
Preservation: concretion, replaced with other
Reposited in the CAS, USNM
Collection methods: salvage, quarrying, surface (float),
• Collected by E.J. Moore, 1952. 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 39589: authorized by Austin Hendy, entered by Austin Hendy on 31.05.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Delectopecten peckhami Gabb 1869 scallop | |
Scaphopoda | |
"Dentalium (? Dentalium) pseudonyma" = Dentalium pseudonyma
"Dentalium (? Dentalium) pseudonyma" = Dentalium pseudonyma Pilsbry and Sharp 1898 tusk shell |