Also known as Locality #91 (Moore, 1963); USGS 18873
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 8 ft of siltstone as based on exposed section. Unknown 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; unlithified, calcareous siltstone
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 39603: authorized by Austin Hendy, entered by Austin Hendy on 31.05.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Cryptonatica oregonensis Conrad 1865 moon snail | |
Ficus modesta Conrad 1848 fig shell | |
Bruclarkia oregonensis Conrad 1848 snail | |
"? Hinia lincolnensis" = Nassarius (Demondia) lincolnensis
"? Hinia lincolnensis" = Nassarius (Demondia) lincolnensis Anderson and Martin 1914 snail | |
"Cancellaria (Euclia) cf. oregonensis" = Cancellaria oregonensis
"Cancellaria (Euclia) cf. oregonensis" = Cancellaria oregonensis Conrad 1865 snail | |
Thais (Polytropa) aff. lima Martyn 1784 murex snail | |
Scaphopoda | |
Dentalium (Rhabdus) schencki Moore 1963 tusk shell | |
Bivalvia | |
Macoma albaria, "Macoma arctata" = Macoma (Psammacoma) arctata
Macoma albaria Conrad 1849 tellin clam
"Macoma arctata" = Macoma (Psammacoma) arctata Conrad 1849 tellin clam | |
Katherinella (Katherinella) angustifrons Conrad 1849 venus clam | |
| |
Acila (Truncacila) conradi Meek 1864 divaricate nutclam | |
Saccella amelga Moore 1963 pointed nut clam |