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: Oligocene-Miocene, Monterey basal sandstone. 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
Reposited in the CAS
Collection methods: surface (float), surface (in situ),
• REPOSITORY: Stanford University; now California Academy of Sciences.
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 37583: authorized by Austin Hendy, entered by Austin Hendy on 17.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Gastropoda | |
Trochita sp. n. sp., Crepidula ? princeps
Trochita sp. n. sp. Schumacher 1817 slipper shell
Crepidula ? princeps Conrad 1855 slipper shell | |
Epitonium clallamense Durham 1937 wentletrap | |
"Musashia ? indurata" = Fulgoraria (Musashia)
"Musashia ? indurata" = Fulgoraria (Musashia) volute | |
Bruclarkia yaquinana Anderson and Martin 1914 snail | |
"Trophosycon clallamensis" = Ficus (Trophosycon)
"Trophosycon clallamensis" = Ficus (Trophosycon) fig shell | |
Sinum scopulosum Conrad 1849 moon snail | |
Bivalvia | |
Nuculana calkinsi pointed nut clam | |
Cyclocardia subtenta Conrad 1849 clam | |
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides
"Thracia trapezoides" = Thracia (Homoeodesma) trapezoides Conrad 1849 clam | |
Panopea ? abrupta Conrad 1849 clam | |
Katherinella angustifrons, "Securella ensifera" = Chione (Securella) ensifera
Katherinella angustifrons Conrad 1849 venus clam
"Securella ensifera" = Chione (Securella) ensifera Dall 1909 venus clam | |
"Spisula albaria" = Mactromeris albaria
"Spisula albaria" = Mactromeris albaria Conrad 1848 clam | |
"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 | |
"Mytilus aff. tichanovitchi" = Mytilus (Tumidimytilus) tichanovitchi
"Mytilus aff. tichanovitchi" = Mytilus (Tumidimytilus) tichanovitchi Makiyama 1934 mussel | |
Vertipecten fucanus Dall 1898 scallop |