Also known as Locality #155 (Moore, 1963); USGS 18906
Where: Lincoln County, Oregon (44.7° N, 124.1° W: paleocoordinates 44.5° N, 119.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Astoria Formation, Langhian (16.0 - 13.8 Ma)
• In silty shale about 40 ft below basalt at Yaquina Head. From an unknown horizon. 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, silty shale
Size class: macrofossils
Preservation: concretion, replaced with other
Reposited in the CAS, USNM
Collection methods: quarrying, surface (float),
• Collected by M.P. James, 1953. 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 39803: authorized by Austin Hendy, entered by Austin Hendy on 06.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Chlorostoma pacificum top snail | |
? Searlesia carlsoni true whelk | |
"? Uzita arnoldi" = Nassarius (Uzita)
"? Uzita arnoldi" = Nassarius (Uzita) snail | |
"Cylichnina petrosa" = Retusa (Cylichnina)
"Cylichnina petrosa" = Retusa (Cylichnina) snail | |
Bivalvia | |
Anadara (Anadara) devincta Conrad 1849 ark | |
""Nuculana" epacris" = Epacroleda epacris
""Nuculana" epacris" = Epacroleda epacris Moore 1964 pointed nut clam |