Lincoln (UGSG 18928) - #156 (Moore, 1963) (Miocene of the United States)

Also known as Locality #156 (Moore, 1963); USGS 18928

Where: Lincoln County, Oregon (44.7° N, 124.1° W: paleocoordinates 44.5° N, 119.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Astoria Formation, Middle Miocene (16.0 - 11.6 Ma)

• From silty shale, about 50-55 ft below basalt. 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

• Astoria Formation is faulted and interupted in exposure by volcanic rocks and land slides.
• From silty shale, about 50-55 ft below basalt. Strata exposed consist of shale varying in silt and sand content, siltstone, fine-grained sandstone with varying amounts of silt, coarse-grained sandstone, conglomerate, and tuff. Calcareous silty shale and fine-grained silty sandstone generally predominate.

Size class: macrofossils

Preservation: concretion, replaced with other

Reposited in the CAS, USNM

Collection methods: 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 39799: authorized by Austin Hendy, entered by Austin Hendy on 06.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for mollusca
Bivalvia
 Arcida - Arcidae
 Mytilida - Mytilidae
Crenella cf. porterensis Weaver 1916 mussel
 Cardiida - Mactridae
"Spisula (Mactromeris) albaria" = Mactromeris albaria
"Spisula (Mactromeris) albaria" = Mactromeris albaria Conrad 1848 clam
 Cardiida - Veneridae
Katherinella (Katherinella) angustifrons, "Chione (Securella) ensifera" = Securella
"Chione (Securella) ensifera" = Securella venus clam
 Cardiida - Tellinidae
Tellina emacerata Conrad 1849 tellin clam
Macoma albaria Conrad 1849 tellin clam
"Macoma arctata" = Macoma (Psammacoma) arctata Conrad 1849 tellin clam
 Hiatellida - Hiatellidae
"Panope (Panope) abrupta" = Panopea abrupta
"Panope (Panope) abrupta" = Panopea abrupta Conrad 1849 clam
 Solenida - Solenidae
"Solen conradi" = Solena (Plectosolen) conradi
"Solen conradi" = Solena (Plectosolen) conradi Dall 1900 clam
 Lucinida - Lucinidae
Lucinoma acutilineata Conrad 1849 clam
 Nuculida - Nuculidae
"Nucula (? Ennucula) nuculana" = Ennucula nut clam
Acila (Truncacila) conradi Meek 1864 divaricate nutclam
Acila (Acila) gettysburgensis divaricate nutclam
 Protobranchia - Nuculanidae
Saccella amelga, ""Nuculana" epacris" = Epacroleda epacris
Saccella amelga pointed nut clam
""Nuculana" epacris" = Epacroleda epacris Moore 1964 pointed nut clam
Gastropoda
 Cephalaspidea - Retusidae
"Cylichnina petrosa" = Retusa (Cylichnina)
"Cylichnina petrosa" = Retusa (Cylichnina) snail
 Neogastropoda - Buccinidae
Antillophos dumbleana true whelk
Subspecies: Antillophos dumbleana chehalisensis
 Neogastropoda - Nassariidae
"? Hinia lincolnensis" = Nassarius (Demondia) lincolnensis, "? Uzita arnoldi" = Nassarius (Uzita)
"? Hinia lincolnensis" = Nassarius (Demondia) lincolnensis Anderson and Martin 1914 snail
"? Uzita arnoldi" = Nassarius (Uzita) snail
 Neogastropoda - Fasciolariidae
 Neogastropoda - Cancellariidae
 Neogastropoda - Volutidae
"Psephaea (Miopleiona) indurata" = Fulgoraria (Psephaea)
"Psephaea (Miopleiona) indurata" = Fulgoraria (Psephaea) volute
 Neogastropoda - Muricidae
 Neogastropoda - Turridae
"Megasurcula wynoocheensis" = Surculites (Megasurcula)
"Megasurcula wynoocheensis" = Surculites (Megasurcula) turrid
 Neogastropoda - Raphitomidae
 Neogastropoda - Pseudomelatomidae
 Ficoidea - Ficidae
Ficus modesta fig shell
 Naticoidea - Naticidae
Sinum scopulosum Conrad 1849 moon snail
Polinices canalis moon snail
 Calyptraeoidea - Calyptraeidae
Crepidula praerupta Conrad 1849 slipper shell
Trochita sp. n. sp. Schumacher 1817 slipper shell
 Sorbeoconcha - Turritellidae
Turritella oregonensis Conrad 1849 turret shell
  - Neptuneidae
 Turbinoidea - Turbinidae
Astraea sp. Röding 1798 snail
 Trochoidea - Trochidae
Trochidae indet. Rafinesque 1815 top snail
Scaphopoda
 Dentaliida - Rhabdidae
Dentalium (Rhabdus) schencki Moore 1964 tusk shell