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)
• SPECIFIC STRATIGRAPHY: From Macoma arctata beds about 10 m thick. 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].
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; lithified sandstone
Size class: macrofossils
Preservation: mold/impression
Collected by Addicott in 1968; 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 37585: authorized by Austin Hendy, entered by Austin Hendy on 17.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Acila conradi" = Acila (Truncacila) conradi
"Acila conradi" = Acila (Truncacila) conradi Meek 1864 divaricate nutclam | |
"Macoma arctata" = Macoma (Psammacoma) arctata, "Tellina emacerata" = Tellina (Oudardia) emacerata
"Macoma arctata" = Macoma (Psammacoma) arctata Conrad 1849 tellin clam
"Tellina emacerata" = Tellina (Oudardia) emacerata Conrad 1849 tellin clam | |
"Spisula albaria" = Mactromeris albaria
"Spisula albaria" = Mactromeris albaria Conrad 1848 clam | |
"Securella ensifera" = Chione (Securella) ensifera, Katherinella angustifrons
"Securella ensifera" = Chione (Securella) ensifera Dall 1909 venus clam
Katherinella angustifrons Conrad 1849 venus clam | |
"Solen conradi" = Solena (Plectosolen) conradi
"Solen conradi" = Solena (Plectosolen) conradi Dall 1900 clam | |
Thracia cf. schencki, "Thracia trapezoides" = Thracia (Homoeodesma) trapezoides
Thracia cf. schencki Teglund 1933 clam
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides Conrad 1849 clam | |
Vertipecten fucanus Dall 1898 scallop | |
Solamen snavelyi crenella | |
"Mytilus aff. tichanovitchi" = Mytilus (Tumidimytilus) tichanovitchi
"Mytilus aff. tichanovitchi" = Mytilus (Tumidimytilus) tichanovitchi Makiyama 1934 mussel | |
Gastropoda | |
Crepidula praerupta Conrad 1849 slipper shell
Crepidula rostralis Conrad 1865 slipper shell | |
Polinices victorianus, "Natica vokesi" = Natica (Natica) clarki
Polinices victorianus Clark and Arnold 1923 moon snail
"Natica vokesi" = Natica (Natica) clarki Etherington 1931 moon snail | |
Ficus ? modesta, "Trophosycon clallamensis" = Ficus (Trophosycon)
Ficus ? modesta Conrad 1848 fig shell
"Trophosycon clallamensis" = Ficus (Trophosycon) fig shell | |
Ophiodermella olympicensis Addicott 1976 turrid | |
Bruclarkia yaquinana Anderson and Martin 1914 snail
Bruclarkia cf. oregonensis Conrad 1848 snail | |
Scaphopoda | |
Dentalium schencki Moore 1963 tusk shell |