Where: Clallam County, Washington (48.2° N, 124.1° W: paleocoordinates 48.0° N, 116.8° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Clallam Formation, Aquitanian (23.0 - 20.4 Ma)
• From three 1-m thick beds in an interval between 191 and 207 m above the base of the formation. The Clallam Formation is the type for the Pacific Northwest Pillarian molluscan stage and is considered early Miocene, likely Aquitanian (Addicott, 1976a). In addition, benthic foraminifera of the Californian Saucesian stage (early Miocene, Aquitanian) are present in the Clallam Formation (Addicott, 1976b). Magnetostratigraphic studies place the Clallam Formation as latest Oligocene/earliest Miocene (Prothero et al., 2001).
• group of beds-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; lithified sandstone
Size class: macrofossils
Preservation: mold/impression
Reposited in the USGS
Collection methods: quarrying,
Primary reference: W.O. Addicott. 1976. Molluscan paleontology of the lower Miocene Clallam Formation, northwestern Washington. United States Geological Survey Professional Paper 976:1-44 [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 37560: authorized by Austin Hendy, entered by Austin Hendy on 16.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium pseudonyma Pilsbry and Sharp 1898 tusk shell
Dentalium schencki Moore 1963 tusk shell | |
Bivalvia | |
Nuculana calkinsi pointed nut clam | |
"Yoldia cf. supramontereyensis" = Yoldia (Kalayoldia) supramontereyensis
"Yoldia cf. supramontereyensis" = Yoldia (Kalayoldia) supramontereyensis Arnold 1908 clam | |
"Acila conradi" = Acila (Truncacila) conradi
"Acila conradi" = Acila (Truncacila) conradi Meek 1864 divaricate nutclam | |
Vertipecten fucanus Dall 1898 scallop | |
Cyclocardia subtenta Conrad 1849 clam | |
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides Conrad 1849 clam | |
"Solen conradi" = Solena (Plectosolen) conradi
"Solen conradi" = Solena (Plectosolen) conradi Dall 1900 clam | |
Panopea abrupta Conrad 1849 clam | |
"Macoma cf. twinensis" = Macoma (Macoma) twinensis, "Macoma arctata" = Macoma (Psammacoma) arctata, Macoma cf. astori, Macoma albaria
"Macoma cf. twinensis" = Macoma (Macoma) twinensis Clark 1925 tellin clam
"Macoma arctata" = Macoma (Psammacoma) arctata Conrad 1849 tellin clam
Macoma cf. astori Dall 1909 tellin clam
Macoma albaria Conrad 1849 tellin clam | |
"Clinocardium aff. nuttallii" = Clinocardium (Clinocardium) nuttallii
"Clinocardium aff. nuttallii" = Clinocardium (Clinocardium) nuttallii Conrad 1837 cockle [entered as Clinocardium nuttalli]
| |
Katherinella augustifrons, "Securella ensifera" = Chione (Securella) ensifera
Katherinella augustifrons venus clam
"Securella ensifera" = Chione (Securella) ensifera Dall 1909 venus clam | |
"Spisula albaria" = Mactromeris albaria Conrad 1848 clam
Spisula sp. Gray 1837 clam
Spisula sookensis Clark and Arnold 1923 clam
Spisula cf. hannibali Clark and Arnold 1923 clam | |
Lucinoma acutilineata Conrad 1849 clam | |
Gastropoda | |
"? Rectiplanes sp." = Antiplanes
"? Rectiplanes sp." = Antiplanes snail | |
Sinum scopulosum Conrad 1849 moon snail | |
Ophiodermella olympicensis Addicott 1976 turrid
? Megasurcula cf. wynoocheensis Weaver 1912 turrid | |
Priscofusus goweri Addicott 1976 snail
Priscofusus cf. stewarti Tegland 1933 snail
Priscofusus aff. geniculus Conrad 1849 snail | |
Bruclarkia yaquinana Anderson and Martin 1914 snail | |
Cancellaria cf. siletzensis, Cancellaria cf. simplex, Cancellaria cf. oregonensis, "Cancellaria wynoocheensis" = Cancellaria wynootchensis
Cancellaria cf. siletzensis Hanna 1924 snail
Cancellaria cf. simplex Anderson 1905 snail
Cancellaria cf. oregonensis Conrad 1865 snail
"Cancellaria wynoocheensis" = Cancellaria wynootchensis Weaver 1916 snail | |
Trochita "n. sp" Schumacher 1817 slipper shell
Crepidula princeps Conrad 1855 slipper shell
Crepidula praerupta Conrad 1849 slipper shell | |
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