UCMP B7266 (Pliocene of the United States)
Where: Contra Costa County, California (37.9° N, 122.2° W: paleocoordinates 37.6° N, 121.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Siesta Formation, Pliocene (5.3 - 2.6 Ma)
Environment/lithology: lacustrine; limestone
• cyclic lacustrine sedimentation in a low energy environment
• gray to white limestone bed approximately 10 feet thick, striking N 60 degrees W
Size class: macrofossils
Primary reference: J. R. Firby. 1967. Pliocene non-marine mollusks from Contra Costa County, California. Proceedings of the California Academy of Sciences 34(14):511-524 [P. Holroyd/P. Holroyd]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 217347: authorized by Patricia Holroyd, entered by Patricia Holroyd on 09.02.2021
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Bivalvia | |
|
Sphaerium cynodon fingernail clam | |
| Gastropoda | |
|
Lymnaea petaluma snail | |