La Joya Exit: Zanclean, Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Scleractinia - Caryophylliidae
Paracyathus stearnsii Verrill 1869
Chondrichthyes - Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816
Chondrichthyes - Carcharhiniformes - Carcharhinidae
Carcharhinus sp. de Blainville 1816
Chondrichthyes - Lamniformes - Lamnidae
Carcharodon sulcidens (Agassiz 1835)
synonym of Carcharodon carcharias
Isurus planus (Agassiz 1856)
Chondrichthyes - Lamniformes - Otodontidae
Carcharodon megalodon (Agassiz 1835)
recombined as Otodus megalodon
Gastropoda - Turbinidae
Turbo sp. Linnaeus 1758
Gastropoda - Trochidae
Tegula funebralis (Adams 1855)
original and current combination Chlorostoma funebrale
Tegula gallina (Forbes 1850)
recombined as Chlorostoma gallina
Calliostoma kerri Arnold 1909
Gastropoda - Neotaenioglossa - Calyptraeidae
Calyptraea mammillaris (Broderip 1834)
recombined as Calyptraea mamillaris
Gastropoda - Turritellidae
Turritella cooperi Carpenter 1864
Gastropoda - Potamididae
Cerithidea californica (Haldeman 1840)
recombined as Cerithideopsis californica
Gastropoda - Neogastropoda - Olividae
Olivella biplicata (Sowerby 1825)
recombined as Callianax biplicata
Gastropoda - Neogastropoda - Muricidae
Acanthina emersoni
Nucella lamellosa (Gmelin 1791)
Thais emarginata
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria tritonidea (Gabb 1866)
recombined as Euclia tritonidea
Gastropoda - Neogastropoda - Turridae
Ophiodermella graciosana (Arnold 1908)
Bivalvia - Nuculida - Nuculidae
Acila castrensis (Hinds 1843)
recombined as Acila (Truncacila) castrensis
Bivalvia - Nuculanida - Nuculanidae
Saccella taphria (Dall 1896)
Bivalvia - Lucinida - Thyasiridae
Thyasira bisecta (Conrad 1849)
recombined as Conchocele bisecta
Bivalvia - Lucinida - Lucinidae
Lucinoma annulata (Reeve 1850)
recombined as Lucinoma annulatum
Bivalvia - Solenida - Pharidae
Siliqua lucida (Conrad 1837)
Bivalvia - Cardiida - Veneridae
Dosinia ponderosa (Gray 1838)
Protothaca tenerrima (Carpenter 1857)
recombined as Callithaca tenerrima
Tivela stultorum (Mawe 1823)
recombined as Tivela (Pachydesma) stultorum
Chione elsmerensis English 1914
recombined as Securella elsmerensis
Bivalvia - Cardiida - Mactridae
Mactra sp. Linnaeus 1767
Spisula hemphilli (Dall 1894)
recombined as Mactromeris hemphillii
Bivalvia - Arcida - Arcidae
Anadara trilineata (Conrad 1856)
Bivalvia - Pectinida - Pectinidae
Patinopecten healeyi (Arnold 1906)
Chlamys parmeleei (Dall 1898)
recombined as Swiftopecten parmeleei
Thecostraca - Balanomorpha - Balanidae
Balanus sp. Da Costa 1778
see common names

Geography
Country:Mexico State/province:Baja California County:Tijuana
Coordinates: 32.5° North, 116.9° West (view map)
Paleocoordinates:32.3° North, 115.7° West
Time
Period:Neogene Epoch:Pliocene
Stage:Zanclean 10 m.y. bin:Cenozoic 6
Key time interval:Zanclean
Age range of interval:5.33300 - 3.60000 m.y. ago
Age estimate:4.2 to 3.6 Ma (other)
Stratigraphy
Formation:San Diego
Stratigraphy comments: Age after Boessenecker et al 2019.
Lithology and environment
Primary lithology: conglomeratic sandstone
Lithology description: The lithology of the base of the San Diego Formation in this area is variable, consisting largely of interbedded sandstone and conglomerate units which rest in angular unconformity on the basalts. The conglomerates consist of a reddish-brown matrix-supported, cobble to boulder sandy conglomerate
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some genera
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:SDSNH 3253
Database number:154115
Authorizer:M. Uhen Enterer:M. Uhen
Modifier:M. Uhen Research group:vertebrate
Created:2014-01-27 19:40:27 Last modified:2019-02-19 12:26:01
Access level:the public Released:2014-01-27 19:40:27
Creative Commons license:CC BY
Reference information

Primary reference:
49967. J. R. Ashby and J. A. Minch. 1984. The upper Pliocene San Diego Formation and the occurrence of Carcharodon megalodon at La Joya, Tijuana, Baja California, Mexico. In J. A. Minch, J. R. Ashby (eds.), Miocene and Cretaceous Depositional Environments of Northwestern Baja California, Mexico: Pacific Section AAPG Guidebook 54:19-17 [M. Uhen/M. Uhen]

Secondary references:

13595 R. W. Boessenecker, D. J. Eheret, D. J. Long, M. Churchill, E. Martin and S. J. Boessenecker. 2019. The Early Pliocene extinction of the mega-toothed shark Otodus megalodon: a view from the eastern North Pacific. PeerJ 7:e6088 [M. Uhen/M. Uhen/M. Uhen]