Caldecott Tunnel, East Retaining Wall of Fourth Bore (Miocene to of the United States)

Also known as UCMP V12012

Where: Contra Costa County, California (37.9° N, 122.2° W: paleocoordinates 37.2° N, 118.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Orinda Formation, Middle Miocene to Middle Miocene (16.0 - 5.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; mudstone

• grey, argillaceous mudstone

Size class: macrofossils

Preservation: trace

Reposited in the UCMP

• specimens recovered during construction

Primary reference: A. W. Poust. 2017. First report of fossil turtle eggshell west of the Colorado Plateau. Historical Biology 29(4):473-479 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185211: authorized by Patricia Holroyd, entered by Patricia Holroyd on 16.04.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Testudinata - Testudoolithidae
cf. Testudoolithus sp. Hirsch 1996 turtle