CSUN Loc. 498 - Santa Susana Mountains [Llajas Fm]: Ypresian - Lutetian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Ampullinidae
Eocernina hannibali (Dickerson 1914)
Squires 1984
Pachycrommium clarki (Stewart 1927)
Squires 1984
Gastropoda - Strombidae
Ectinochilus (Macilentos) macilentus (White 1889)
Squires 1984
original and current combination Rimella macilenta
Gastropoda - Neogastropoda - Olividae
Olivella mathewsonii Gabb 1864
Squires 1984
Gastropoda - Neogastropoda - Clavatulidae
Fusiturricula (Crenaturricula) crenatospira (Cooper 1894)
Squires 1984
recombined as Crenaturricula crenatospira
as Fusiturricula (Crenaturricula) crenatospira domenginica
Gastropoda - Neogastropoda - Conidae
Conus caleocius Vokes 1939
Squires 1984
Conus hornii Gabb 1864
Squires 1984
as Conus hornii umpquaensis
Gastropoda - Neogastropoda - Clathurellidae
Domenginella claytonensis (Gabb 1864)
Squires 1984
Gastropoda - Neogastropoda - Turridae
Surculites mathewsonii (Gabb 1864)
Squires 1984
Gastropoda - Neogastropoda - Volutidae
Lyria andersoni Waring 1917
Squires 1984
Gastropoda - Ranellidae
Cymatium janetae n. sp. Squires 1983
Gastropoda - Bursidae
Ranellina pilsbryi Stewart 1927
Squires 1984
Gastropoda - Cerithiopsidae
Cerithiopsis llajasensis Squires 1984
Squires 1984
Gastropoda - Opisthobranchia - Retusidae
Cylichnina tantilla (Anderson and Hanna 1925)
Squires 1984
Bivalvia - Pholadida - Corbulidae
Corbula (Caryocorbula) dickersoni (Weaver and Palmer 1922)
Squires 1984
see common names

Geography
Country:United States State/province:California County:Los Angeles
Coordinates: 34.0° North, 118.0° West (view map)
Paleocoordinates:35.8° North, 102.2° West
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2
*Period:Early/Lower Tertiary - Middle Tertiary *Epoch:Early/Lower Eocene - Middle Eocene
*International age/stage:Middle Lutetian - Early/Lower Ypresian *Local age/stage:Domengine - Domengine
Key time interval:Ypresian - Lutetian
Age range of interval:56.00000 - 41.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Llajas
Stratigraphic resolution:bed
Stratigraphy comments: The stewart bed is a 1 m thick sandstone unit in the middle of the LLajas formation.
Lithology and environment
Primary lithology:bioturbation sandstone
Includes fossils?Y
Lithology description: sandstone.
Environment:offshore
Geology comments: The stewart bed is located in a section of transition from shallow-marine to outer slope and shelf facies.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:LACM
Taxonomic list comments:New species only.
Metadata
Also known as:LACMIP Loc. 16189
Database number:8018
Authorizer:L. Ivany, J. Marcot Enterer:E. Kowalski, J. Marcot
Modifier:J. Marcot Research group:marine invertebrate
Created:2000-06-12 08:47:08 Last modified:2022-02-12 17:49:06
Access level:the public Released:2000-06-12 08:47:08
Creative Commons license:CC BY
Reference information

Primary reference:

519. R. L. Squires. 1983. New Mollusks from the Lower Middle Eocene Llajas Formation, Southern California. Journal of Paleontology 57(2):354-362 [L. Ivany/E. Kowalski/J. Marcot]

Secondary references:

59877 R. L. Squires. 1984. Megapaleontology of the Eocene Llajas Formation, Simi Valley, California. Contributions in Science, Natural History Museum of Los Angeles County 350:1-76 [M. Clapham/M. Clapham]