CSUN Loc. 975 [Juncal Fm] (Eocene of the United States)

Also known as LACMIP Loc. 16201

Where: Ventura County, California (34.8° N, 119.2° W: paleocoordinates 35.5° N, 105.1° W)

• outcrop-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, lag, argillaceous siltstone and poorly lithified sandstone

• the juncal formation in northern lockwood valley is 605 m thick and consist predominantly of muddy siltstone with minor amounts of sandstone and scattered lenses with fossils. lenses are fine to coarse sandstones representing storm lag deposits.

Size class: macrofossils

Reposited in the LACM

Collection methods: bulk,

• Samples were taken for microfossil (nannos and planktonic forams) collection, but all were barren.

Primary reference: R. L. Squires. 1988. Eocene Macropaleontology of Northern Lockwood Valley, Ventura County, California. Contributions in Science (Natural History Museum of Los Angeles County) 398:1-23 [A. Miller/K. Layou]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5527: authorized by Arnold Miller, entered by Karen Layou on 11.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Polychaeta
 Sabellida - Serpulidae
"Rotularia tejonense" = Rotularia (Rotularia) tejonense
"Rotularia tejonense" = Rotularia (Rotularia) tejonense Arnold 1909
? in locality information
Gastropoda
 Opisthobranchia - Retusidae
Cylichnina tantilla Anderson and Hanna 1925 snail
 Neogastropoda - Clavatulidae
"Cryptoconus cooperi" = Turricula cooperi
"Cryptoconus cooperi" = Turricula cooperi Dickerson 1916 snail
 Neogastropoda - Turridae
Trypanotoma stocki Dickerson 1916 turrid
 Sorbeoconcha - Strombidae
Ectinochilus macilentus White 1889 true conch
Bivalvia
 Arcida - Glycymerididae
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata Gabb 1864 clam
? in locality information
 Cardiida - Veneridae
Pitar joaquinensis Vokes 1939 venus clam