La Joya Exit: Zanclean, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
- Scleractinia
- Caryophylliidae
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Paracyathus stearnsii
Verrill 1869
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Chondrichthyes
- Carcharhiniformes
- Carcharhinidae
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Carcharhinus sp.
de Blainville 1816
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Chondrichthyes
- Lamniformes
- Otodontidae
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Carcharodon megalodon
(Agassiz 1835)
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recombined as Otodus megalodon | |||||||
Chondrichthyes
- Lamniformes
- Lamnidae
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Isurus planus
(Agassiz 1856)
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Carcharodon sulcidens
(Agassiz 1835)
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synonym of Carcharodon carcharias | |||||||
Chondrichthyes
- Myliobatiformes
- Myliobatidae
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Myliobatis sp.
Cuvier 1816
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Bivalvia
- Arcida
- Arcidae
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Anadara trilineata
(Conrad 1856)
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Bivalvia
- Pectinida
- Pectinidae
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Patinopecten healeyi
(Arnold 1906)
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Chlamys parmeleei
(Dall 1898)
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recombined as Swiftopecten parmeleei | |||||||
Bivalvia
- Lucinida
- Lucinidae
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Lucinoma annulata
(Reeve 1850)
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recombined as Lucinoma annulatum | |||||||
Bivalvia
- Lucinida
- Thyasiridae
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Thyasira bisecta
(Conrad 1849)
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recombined as Conchocele bisecta | |||||||
Bivalvia
- Cardiida
- Veneridae
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Chione elsmerensis
English 1914
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recombined as Securella elsmerensis | |||||||
Dosinia ponderosa
(Gray 1838)
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Protothaca tenerrima
(Carpenter 1857)
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recombined as Callithaca tenerrima | |||||||
Tivela stultorum
(Mawe 1823)
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recombined as Tivela (Pachydesma) stultorum | |||||||
Bivalvia
- Cardiida
- Mactridae
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Spisula hemphilli
(Dall 1894)
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recombined as Mactromeris hemphillii | |||||||
Mactra sp.
Linnaeus 1767
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Bivalvia
- Solenida
- Pharidae
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Siliqua lucida
(Conrad 1837)
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Bivalvia
- Nuculanida
- Nuculanidae
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Saccella taphria
(Dall 1896)
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Bivalvia
- Nuculida
- Nuculidae
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Acila castrensis
(Hinds 1843)
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recombined as Acila (Truncacila) castrensis | |||||||
Gastropoda
- Turbinidae
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Turbo sp.
Linnaeus 1758
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Gastropoda
- Trochidae
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Calliostoma kerri
Arnold 1909
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Tegula funebralis
(Adams 1855)
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original and current combination Chlorostoma funebrale | |||||||
Tegula gallina
(Forbes 1850)
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recombined as Chlorostoma gallina | |||||||
Gastropoda
- Potamididae
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Cerithidea californica
(Haldeman 1840)
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recombined as Cerithideopsis californica | |||||||
Gastropoda
- Turritellidae
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Turritella cooperi
Carpenter 1864
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Gastropoda
- Neogastropoda
- Cancellariidae
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Cancellaria tritonidea
(Gabb 1866)
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recombined as Euclia tritonidea | |||||||
Gastropoda
- Neogastropoda
- Olividae
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Olivella biplicata
(Sowerby 1825)
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recombined as Callianax biplicata | |||||||
Gastropoda
- Neogastropoda
- Turridae
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Ophiodermella graciosana
(Arnold 1908)
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Gastropoda
- Neogastropoda
- Muricidae
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Acanthina emersoni
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Thais emarginata
(Deshayes 1839)
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Nucella lamellosa
(Gmelin 1791)
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea mammillaris
(Broderip 1834)
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recombined as Calyptraea mamillaris | |||||||
Thecostraca
- Balanomorpha
- Balanidae
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Balanus sp.
Da Costa 1778
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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] |