CSUN loc. 354, Garapito Creek: Thanetian, California
collected by J. Alderson

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Spatangoida - Schizasteridae
Schizaster (Schizaster) martinezensis Kew 1920
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
Bivalvia - Carditida - Carditidae
Venericardia (Glyptoactis) keenae Verástegui 1953
recombined as Glyptoactis (Claibornicardia) keenae
Bivalvia - Cardiida - Tellinidae
Tellina sp. Linnaeus 1758
Bivalvia - Solenida - Solenidae
? Solen sp. Linnaeus 1758
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya nasuta Gabb 1864
Gastropoda - Turritellidae
Turritella infragranulata Gabb 1864
Gastropoda - Naticidae
Crommium cf. pinyonensis (Dickerson 1914)
original and current combination Natica pinyonensis
Gastropoda - Vermetidae
? Vermetidae indet. Rafinesque 1815
Gastropoda - Neogastropoda - Buccinidae
Brachysphingus sinuatus Gabb 1869
Squires 1997
Malacostraca - Decapoda - Tumidocarcinidae
Cyclocorystes aldersoni n. sp. Squires 1980
see common names

Geography
Country:United States State/province:California County:Los Angeles
Coordinates: 34.1° North, 118.6° West (view map)
Paleocoordinates:37.9° North, 99.1° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Paleocene
Stage:Thanetian 10 m.y. bin:Cenozoic 1
Key time interval:Thanetian
Age range of interval:59.20000 - 56.00000 m.y. ago
Stratigraphy
Formation:Coal Canyon
Stratigraphic resolution:group of beds
Stratigraphy comments: "Martinez Provincial Stage... late Paleocene" (Coal Canyon Formation in Squires, 1990)
Lithology and environment
Primary lithology:concretionary lithified calcareous siltstone
Lithology description: "98% siltstone beds with 2% interbedded fine sandstone beds. The crabs occur in calcareous concretions, 15-25 mm in diameter, from noncalcareous siltstones at the middle and near the top of the 5 m-thick section"
Environment:coastal indet.
Geology comments: "between low water and about 180 m where wave and current action are moderate" based on fauna
Taphonomy
Modes of preservation:body,mold/impression
Size of fossils:macrofossils
Spatial resolution:autochthonous
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:LACM
Collectors:J. Alderson
Metadata
Also known as:Garapito Creek; Sylvia Park
Database number:90072
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Marcot Research group:marine invertebrate
Created:2009-07-06 19:39:54 Last modified:2020-10-09 12:54:35
Access level:the public Released:2009-07-06 19:39:54
Creative Commons license:CC BY
Reference information

Primary reference:
30195. R. L. Squires. 1980. A new species of brachyuran from the Paleocene of California. Journal of Paleontology 54(2):472-476 [J. Alroy/J. Alroy]

Secondary references:

63342 R. L. Squires. 1997. Taxonomy and Distribution of the Buccinid Gastropod Brachysphingus from Uppermost Cretaceous and Lower Cenozoic Marine Strata of the Pacific Slope of North America. Journal of Paleontology 71(5):847-861 [P. Wagner/P. Wagner]