Kirker Pass (Oligocene of the United States)
Also known as LACM 4304
Where: Contra Costa County, California (38.0° N, 121.9° W: paleocoordinates 36.3° N, 112.2° W)
• coordinate estimated from map
When: lower sandstone Member (Kirker Formation), Rupelian (33.9 - 28.1 Ma)
Environment/lithology: marine; sandstone
Size class: macrofossils
Primary reference: B. L. Clark. 1915. Fauna of the San Pablo group of middle California. University of California Publications Bulletin of the Department of Geology 8(22):385-572 [J. Marcot/J. Marcot]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 199729: authorized by Mark Uhen, entered by Mark Uhen on 08.02.2019, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Chondrichthyes | |
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| Echinoidea | |
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"Astrodapsis tumidus n. sp." = Astrodapsis antiselli2 Conrad 1856 sand dollar from "Kirker's Pass formations," so maybe not this collection?
Astrodapsis whitneyi n. sp.2 Rémond 1863 sand dollar from "Kirker's Pass formations," so maybe not this collection?
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| Gastropoda | |
Littorina remondii n. sp.3
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| Bivalvia | |
"Pecten (Lyropecten) crassicardo" = Lyropecten crassicardo1
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"Ostrea bourgeoisii" = Striostrea bourgeoisii
"Ostrea bourgeoisii" = Striostrea bourgeoisii Rémond 1863 oyster UCMP 2140, so maybe not this locality?
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