Also known as Locality #6 (Moore, 1963); USGS 5320
Where: Clatsop County, Oregon (46.2° N, 123.8° W: paleocoordinates 46.0° N, 117.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Lower Sandstone Member (Astoria Formation), Burdigalian (20.4 - 16.0 Ma)
• Lower Sandstone Member. 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; poorly lithified, fine-grained, concretionary, silty, carbonaceous sandstone
Size class: macrofossils
Preservation: concretion, replaced with other
Reposited in the CAS, USNM
Collection methods: salvage, quarrying, surface (float),
• Collected by R.F. Rogers, 1910. 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 39585: authorized by Austin Hendy, entered by Austin Hendy on 31.05.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Propeamussium cf. clallamensis mud scallop | |
Macoma cf. albaria Conrad 1849 tellin clam | |
"Nucula" sp. n. sp.
"Nucula" sp. n. sp. Lamarck 1799 nut clam |