USGS Cenozoic M1455 San Antonio River Road: Messinian, California
collected by D. L Durham 1962

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula adunca Sowerby 1824
Calyptraea sp. Lamarck 1799
Gastropoda - Turritellidae
Turritella cooperi Carpenter 1864
Gastropoda - Cerithiidae
Bittium sp. Gray 1847
Gastropoda - Neogastropoda - Olividae
Olivella sp. Swainson 1831
Gastropoda - Neogastropoda - Nassariidae
Nassarius aff. californianus (Conrad 1856)
recombined as Caesia californiana
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria cf. fernandoensis Arnold 1907
recombined as Euclia fernandoensis
Gastropoda - Naticidae
Neverita sp. Risso 1826
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander aff. jugularis (Conrad 1855)
Bivalvia - Carditida - Carditidae
Cyclocardia cf. californica (Dall 1903)
recombined as Coanicardita californica
Bivalvia - Lucinida - Lucinidae
Lucinisca informal n. sp. ? aff. nuttalli
spelled with current rank as Lucina (Lucinisca)
Here excavata (Carpenter 1857)
Bivalvia - Solenida - Solenidae
Solen cf. perrini Clark 1915
recombined as Solena (Eosolen) perrini
Bivalvia - Pholadida - Myidae
Cryptomya californica (Conrad 1837)
Bivalvia - Cardiida - Veneridae
Chione aff. gnidia (Broderip and Sowerby I 1829)
recombined as Chionopsis gnidia
Protothaca tenerrima (Carpenter 1857)
recombined as Callithaca tenerrima
Protothaca cf. staminea (Conrad 1837)
recombined as Leukoma staminea
Bivalvia - Cardiida - Mactridae
Spisula sp. Gray 1837
Bivalvia - Cardiida - Cardiidae
? Clinocardium sp. Keen 1936
Bivalvia - Cardiida - Tellinidae
Florimetis biangulata (Carpenter 1856)
synonym of Leporimetis obesa
Macoma nasuta (Conrad 1837)
Bivalvia - Mytilida - Mytilidae
Mytilus cf. coalingensis (Arnold 1909)
Bivalvia - Arcida - Arcidae
Anadara cf. trilineata (Conrad 1856)
Bivalvia - Pectinida - Pectinidae
Lyropecten sp. Conrad 1862
see common names

Geography
Country:United States State/province:California County:Monterey
Coordinates: 35.9° North, 121.1° West (view map)
Paleocoordinates:34.3° North, 117.8° West
Basis of coordinate:stated in text
Time
Period:Neogene Epoch:Miocene
Stage:Messinian 10 m.y. bin:Cenozoic 6
Key time interval:Messinian
Age range of interval:7.24600 - 5.33300 m.y. ago
Stratigraphy
Formation:Pancho Rico
Stratigraphy comments: Described in reference as Pliocene. Pancho Rico Formation is Miocene per Addicott 1978 (Geological Survey Bulletin, Issue 1457). AGE: Revised to Messian consistent with EPICC stratigraphic revision [A. Hendy, 06/2020].
Lithology and environment
Primary lithology: not reported
Environment:marine indet.
Geology comments: A westward shoaling and possible depositional limit of the Pancho Rico Formation, at least in the southwestern part of the outcrop area, is suggested by the relatively thin sequence of coarse-grained clastic rocks containing abundant mollusks indicative of shallow water.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Collectors:D. L Durham Collection dates:1962
Metadata
Also known as:UCMP IP6742
Database number:194888
Authorizer:P. Holroyd Enterer:S. Tremblay
Modifier:A. Hendy Research group:marine invertebrate
Created:2018-07-06 12:47:37 Last modified:2020-06-16 03:40:33
Access level:the public Released:2018-07-06 12:47:37
Creative Commons license:CC BY
Reference information

Primary reference:
66206. D. L. Durham and W. O. Addicott. 1965. Pancho Rico Formation, Salinas Valley. United States Geological Survey Professional Paper 524(A):A1-A22 [P. Holroyd/S. Tremblay]