Also known as UCMP V6931, UCMP V6930
Where: Marin County, California (38.0° N, 123.0° W: paleocoordinates 37.5° N, 120.2° W)
• coordinate estimated from map
When: Drakes Bay Formation, Tortonian (11.6 - 7.2 Ma)
• Domning (1977) states that this collection is early Pliocene, despite a K/Ar date of 9.3, which is clearly Tortonian (Galloway, 1977)
• group of beds-level stratigraphic resolution
Environment/lithology: shallow subtidal; glauconitic sandstone
Size class: macrofossils
Preservation: soft parts, original phosphate
Reposited in the UCMP
Primary reference: D. P. Domning. 1978. Sirenian evolution in the North Pacific Ocean. University of California Publications in Geological Sciences 118:1-176 [M. Uhen/M. Uhen/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 52216: authorized by Mark Uhen, entered by Mark Uhen on 01.08.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
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cf. Dusignathus sp. Kellogg 1927 walrus | |
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Delphinapterinae indet. Gill 1871 toothed whale | |
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Scaldicetus cf. grandis Du Bus 1872 toothed whale
aff. Argyrocetus sp. Lydekker 1894 toothed whale This id seems unlikely given the early Pliocene age of the collection (MDU).
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cf. Balaenula sp. Van Beneden 1872 right whale | |
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| Osteichthyes | |
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Acipenseriformes indet. Berg 1940 ray-finned fish | |
| Actinopteri | |
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Smilodonichthys sp. Cavender and Miller 1972 saber toothed salmon | |
| Chondrichthyes | |
"Isurus hastalis" = Carcharodon hastalis
"Isurus hastalis" = Carcharodon hastalis Agassiz 1838 white shark | |