UCMP A3821, Bryon Quad (Eocene of the United States)

Where: Contra Costa County, California (37.9° N, 121.7° W: paleocoordinates 38.7° N, 107.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Domengine Formation, Lutetian (47.8 - 41.3 Ma)

• A short distance above basal conglomerate.

•Putnick et al. (2001): the Domengine and Avenal Sandstones correlate with earliest middle Eocene Chron C21r (47.9-49.0 Ma).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Primary reference: J. W. Durham. 1943. Pacific Coast Cretaceous and Tertiary corals. Journal of Paleontology 17(2):196-202 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36863: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 18.02.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Corals only
 Scleractinia - Cunnolitidae
"? Cyclolites sp." = Cunnolites
"? Cyclolites sp." = Cunnolites Gagnebin 1772 stony coral
 Scleractinia - Caryophylliidae
Platytrochus diabloensis n. sp. Durham 1943 stony coral