Where: Contra Costa County, California (38.0° N, 122.1° W: paleocoordinates 42.4° N, 101.5° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Vine Hill Formation, Selandian (61.6 - 59.2 Ma)
• STRATIGRAPHIC RELATIONS: From the "Martinez", now mapped as Vine Hill Sandstone, lower member. AGE: Paleocene, according to Miller (1947). The lower Vine Hill Sandstone includes the Selandian Turritella peninsularis Zone of Soul (1983) and the middle Vine Hill includes the Selandian Turritella infragranulata pachecoensis Zone. Bukry et al. (1998) found calcareous nannofossil zones CP5, CP10, and CP11 in the upper Vine Hill Sandstone (latest Selandian-Ypresian), implying an age no younger than Selandian for the lower Vine Hill. McDougall (2007) assigned the Vine Hill to the Ynezian benthic foraminferal zone, correlated with planktonic zone P4 and nannofossil zones CP5-CP7, of Selandian-Thanetian age. STRATIGRAPHIC POSITION: From unknown position within section.
• group of beds-level stratigraphic resolution
Environment/lithology: coastal; lithified siliciclastic sediments
Size class: macrofossils
Preservation: cast, mold/impression
Reposited in the UCMP
• COLLECTOR: Unknown collector. REPOSITORY: University of California.
Primary reference: R. E. Dickerson. 1914. Fauna of the Martinez Eocene of California. Bulletin of the Department of Geology, University of California 6:61-180 [P. Holroyd/P. Holroyd/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 81800: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2008, edited by Matthew Clapham, Kristina Okamoto, Patricia Holroyd and Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Phacoides muirensis n. sp." = Claibornites (Codalucina) muirensis
"Phacoides muirensis n. sp." = Claibornites (Codalucina) muirensis Dickerson 1914 clam | |
Cephalopoda | |
"Nautilus stephensoni n. sp." = Eutrephoceras stephensoni3
| |
Hercoglossa merriami n. sp.1
| |
Gastropoda | |
Fissurella behri n. sp.
Fissurella behri n. sp. Dickerson 1914 snail | |
"Urosyca robusta n. sp." = Priscoficus robustus2
| |
Ovula martini n. sp.
Ovula martini n. sp. Dickerson 1914 snail | |
Surcula andersoni n. sp.
Surcula andersoni n. sp. Dickerson 1914 snail | |
Anchura englishi n. sp.
Anchura englishi n. sp. Dickerson 1914 snail |