CSUN Loc. 980 [Juncal Fm] (Eocene of the United States)

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 consists predominantly of muddy siltstone with minor amounts of sandstone scattered lenses with fossils. lenses are fine to coarse sandstone 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 5540: authorized by Arnold Miller, entered by Karen Layou on 12.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata
"Glycymeris sagittata" = Glycymeris (Glycymerita) sagittata Gabb 1864 clam
 Arcida - Arcidae
"Barbatia cf. cliffensis" = Barbatia (Cucullaearca) cliffensis
"Barbatia cf. cliffensis" = Barbatia (Cucullaearca) cliffensis Hanna 1927 clam
 Cardiida - Cardiidae
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum
"Nemocardium linteum" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
 Cardiida - Veneridae
Callista vokesi venus clam
Callista hornii vokesi
Pitar joaquinensis Vokes 1939 venus clam
Gastropoda
 Opisthobranchia - Retusidae
Cylichnina tantilla Anderson and Hanna 1925 snail
 Neotaenioglossa - Calyptraeidae
Calyptraea diegoana Conrad 1855 slipper shell
 Architaenioglossa - Ampullinidae
Pachycrommium clarki Stewart 1927 snail
 Sorbeoconcha - Strombidae
"Ectinochilus macilentus" = Rimella macilenta
"Ectinochilus macilentus" = Rimella macilenta White 1889 true conch
 Sorbeoconcha - Seraphsidae
Paraseraphs erraticus Cooper 1894 snail
 Sorbeoconcha - Ficidae
"Ficopsis crescentensis" = Ficus
"Ficopsis crescentensis" = Ficus fig shell
Ficopsis remondii crescentensis
 Neogastropoda - Volutidae
Lyria andersoni Waring 1917 volute
 Neogastropoda - Cancellariidae
Bonellitia paucivaricata Gabb 1864 snail
 Sorbeoconcha - Cymatiidae
"Olequahia domenginica" = Ranella domenginica
"Olequahia domenginica" = Ranella domenginica Vokes 1939 snail
 Cerithioidea - Turritellidae
Turritella buwaldana Dickerson 1916 turret shell