Where: Clallam County, Washington (48.3° N, 124.3° W: paleocoordinates 47.9° N, 115.3° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Clallam Formation, Chattian (28.1 - 23.0 Ma)
• 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 UW
Collection methods: surface (float), surface (in situ),
• RESPITORY: Burke Museum, UW.
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 37594: authorized by Austin Hendy, entered by Austin Hendy on 17.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Trochita sp. Schumacher 1817 slipper shell
Crepidula praerupta Conrad 1849 slipper shell | |
Ancistrolepis rearensis true whelk | |
Bruclarkia yaquinana Anderson and Martin 1914 snail | |
Sinum scopulosum Conrad 1849 moon snail |