CSUN Loc. 984, Lockwood Valley (Eocene of the United States)

Also known as LACMIP Loc. 16178

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 primarily of muddy siltstone with minor amounts of sandstone and 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)collections, 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 5542: authorized by Arnold Miller, entered by Karen Layou on 12.10.1999, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica cognata" = Architectonica (Stellaxis) cognata
"Architectonica cognata" = Architectonica (Stellaxis) cognata Gabb 1864 sundial
 Cerithioidea - Turritellidae
Turritella buwaldana, Turritella andersoni, Turritella uvasana
Turritella buwaldana Dickerson 1916 turret shell
? in locality information
Turritella andersoni Dickerson 1916 turret shell
Turritella uvasana Conrad 1855 turret shell
? in locality information; Turritella uvasana hendoni (s.l.)
 Architaenioglossa - Ampullinidae
Pachycrommium clarki, Eocernina hannibali
Pachycrommium clarki Stewart 1927 snail
Eocernina hannibali Dickerson 1914 snail
 Neotaenioglossa - Calyptraeidae
Calyptraea diegoana
Calyptraea diegoana Conrad 1855 slipper shell
 Sorbeoconcha - Cymatiidae
"Olequahia domenginica" = Ranella domenginica
"Olequahia domenginica" = Ranella domenginica Vokes 1939 snail
 Sorbeoconcha - Xenophoridae
Xenophora stocki
Xenophora stocki Dickerson 1916 carrier shell
 Sorbeoconcha - Cypraeidae
Subepona leahae
Subepona leahae Groves and Squires 2023 cowry
 Sorbeoconcha - Strombidae
Ectinochilus macilentus
Ectinochilus macilentus White 1889 true conch
 Neogastropoda - Fasciolariidae
Clavilithes tabulatus
Clavilithes tabulatus Dickerson 1913 snail
 Neogastropoda - Clavatulidae
"Cryptoconus cooperi" = Turricula cooperi
"Cryptoconus cooperi" = Turricula cooperi Dickerson 1916 snail
 Opisthobranchia - Retusidae
Cylichnina tantilla
Cylichnina tantilla Anderson and Hanna 1925 snail
Bivalvia
 Cardiida - Veneridae
Pitar joaquinensis
Pitar joaquinensis Vokes 1939 venus clam
Polychaeta
 Sabellida - Serpulidae
"Rotularia (Rotularia) tejonensis" = Rotularia (Rotularia) tejonense
"Rotularia (Rotularia) tejonensis" = Rotularia (Rotularia) tejonense Arnold 1909