CSUN 1342, Runkle Canyon (Paleocene of the United States)

Where: Ventura County, California (34.2° N, 118.7° W: paleocoordinates 38.0° N, 99.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Santa Susana Formation, Thanetian (59.2 - 56.0 Ma)

• Age: late Paleocene ("Meganos Stage"). 90 m stratigraphically below the bottom of the overlying Llajas Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, fine-grained sandstone

• The fossiliferous lens at locality 1342 is interpreted to represent a storm deposit in a middle to outer shelf environment

Size class: macrofossils

Collected by R.L. Squires in 1989; reposited in the LACM

Primary reference: R. L. Squires. 1990. New Paleogene Fimbria (Mollusca: Bivalvia) from the Pacific coast of southwestern North America. Journal of Paleontology 64:552-556 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185193: authorized by Matthew Clapham, entered by Matthew Clapham on 15.04.2017, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Cardiida - Tellinidae
Macoma rosa Hanna 1927 tellin clam
 Lucinida - Lucinidae
Fimbria susanensis Squires 1990 clam
 Protobranchia - Nuculanidae
Nuculana (Saccella) gabbii Conrad 1869 pointed nut clam
Gastropoda
 Calyptraeoidea - Calyptraeidae
Calyptraea diegoana Conrad 1855 slipper shell
 Sorbeoconcha - Turritellidae
Turritella buwaldana Dickerson 1916 turret shell
 Neritoidea - Neritidae
Velates perversus Gmelin 1791 snail
Anthozoa
 Scleractinia - Astrocoeniidae
? Astrocoenia sp. Milne-Edwards and Haime 1848 stony coral