Also known as Slip Point
Where: Clallam County, Washington (48.3° N, 122.3° W: paleocoordinates 48.0° N, 113.3° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Clallam Formation, Chattian (28.1 - 23.0 Ma)
• GENERAL STRATIGRAPHY: The Clallam Formation is a predominantly marine sandstone with minor conglomerate and siltstone exposed along the Strait of Juan de Fuca in northwestern Washington. Marine molluscs occur throughout the 600 to 800 m thick formation but are especially abundant in the lowermost 240 m. Pillarian Stage age, a provincial time stratigraphic unit of late early Miocene age. Revised to Chattian following more recent work [Hendy, 7/2016].
• bed-level stratigraphic resolution
Environment/lithology: offshore; lithified sandstone
Size class: macrofossils
Preservation: mold/impression
Collected by Addicott in 1970; reposited in the USGS
Collection methods: surface (float), surface (in situ),
• REPOSITORY: USGS (Menlo Park).
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: biostratigraphic analysis
PaleoDB collection 37580: authorized by Austin Hendy, entered by Austin Hendy on 17.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium cf. schencki Moore 1963 tusk shell | |
Gastropoda | |
Crepidula rostralis Conrad 1865 slipper shell
Crepidula ? princeps Conrad 1855 slipper shell
Trochita sp. n. sp. Schumacher 1817 slipper shell | |
Polinices victorianus Clark and Arnold 1923 moon snail
Natica cf. clarki Etherington 1931 moon snail | |
Bruclarkia yaquinana Anderson and Martin 1914 snail | |
Ophiodermella olympicensis Addicott 1976 turrid | |
Semicassis pyshtensis Addicott 1976 snail | |
Bivalvia | |
Nuculana cf. calkinsi pointed nut clam | |
"Acila conradi" = Acila (Truncacila) conradi
"Acila conradi" = Acila (Truncacila) conradi Meek 1864 divaricate nutclam | |
"Mytilus aff. tichanovitchi" = Mytilus (Tumidimytilus) tichanovitchi
"Mytilus aff. tichanovitchi" = Mytilus (Tumidimytilus) tichanovitchi Makiyama 1934 mussel | |
Vertipecten fucanus Dall 1898 scallop | |
Glycymeris sp. Da Costa 1778 clam | |
"Clinocardium aff. nuttallii" = Clinocardium (Clinocardium) nuttallii
"Clinocardium aff. nuttallii" = Clinocardium (Clinocardium) nuttallii Conrad 1837 cockle [entered as Clinocardium nuttalli]
| |
"Tellina emacerata" = Tellina (Oudardia) emacerata, Macoma sookensis
"Tellina emacerata" = Tellina (Oudardia) emacerata Conrad 1849 tellin clam
Macoma sookensis Clark and Arnold 1923 tellin clam | |
"Dosinia whitneyi" = Dosinia (Dosinia) whitneyi, Katherinella angustifrons, "Securella ensifera" = Chione (Securella) ensifera
"Dosinia whitneyi" = Dosinia (Dosinia) whitneyi Gabb 1866 venus clam
Katherinella angustifrons Conrad 1849 venus clam
"Securella ensifera" = Chione (Securella) ensifera Dall 1909 venus clam | |
Spisula sookensis, "Spisula albaria" = Mactromeris albaria
Spisula sookensis Clark and Arnold 1923 clam
"Spisula albaria" = Mactromeris albaria Conrad 1848 clam | |
"Solen conradi" = Solena (Plectosolen) conradi
"Solen conradi" = Solena (Plectosolen) conradi Dall 1900 clam | |
Panopea ramonensis Clark 1925 clam
Panopea abrupta Conrad 1849 clam | |
Lucinoma acutilineata Conrad 1849 clam | |
Cyclocardia subtenta Conrad 1849 clam |