Puente Formation

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Puente Formation
Stratigraphic range: Tortonian
↓
TypeGeological formation
Unit ofLos Angeles Basin
Sub-units(ascending) La Vida, Soquel, Yorba, Sycamore Canyon[1]
Underlies
Overlies
ThicknessAbout 3900 meters[2]
Lithology
PrimarySandstone, conglomerate & mudrock[2]
Location
RegionCalifornia
CountryUnited States
Type section
Named forPuente Hills

The Puente Formation is a geologic formation in California. It preserves fossils dating back to the middle to upper Miocene epoch of the Neogene period, most of which were deposited in a deepwater environment.[2] Owing to its depositional environment, it is one of the very few geologic formations to preserve articulated specimens of fossilized deep-sea anglerfish.[3]

File:Cenozoic Basin Stratigraphy.pdf
Stratigraphy of the Los Angeles Basin incl. Puente Formation

As its name suggests, it primarily outcrops in the Puente Hills.[1]

Paleoecology

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The Yorba Member of the Puente Formation preserves some of the world's only known fossils of deep-sea anglerfish, most of which were discovered during the construction of a rail line. These anglerfish are assigned to several genera and species that inhabit hypoxic, upwelling-influenced subtropical and tropical environments in the eastern Pacific today, suggesting that the composition of these ecological communities has changed little in the time since the deposition of this formation. These taxa are not found off the coast of California today, suggesting that the region was much warmer and more tropical during the late Miocene. The minimum depth of this depositional environment would have been about 1,000 metres (3,300 ft) deep.[4][5]

Paleobiota

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Ray-finned fish

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Based on Fierstine et al (2012):[3]

Genus Species Location Member Material Notes Images
Acentrophryne A. sp. City of Industry, Pomona Freeway Chalk Hill Yorba Articulated skeleton An leftvent deep-sea anglerfish.[6] File:Acentrophryne longidens 2.png
Acipenseridae indet. Subopercule A sturgeon of uncertain affinities.
Argentina A. sp. Pomona Freeway Chalk Hill "Remains" A herring smelt. File:Argentina elongata (no common name).gif
Argyropelecus A. sp. Pomona Freeway Chalk Hill Unknown A marine hatchetfish. File:Argyropelecus olfersii1.jpg
Atherinops A. sp. Pomona Freeway Chalk Hill Unknown A Neotropical silverside related to the modern topsmelt silverside. File:Atherinops affinis.png
Atherinopsis A. sp. Pomona Freeway Chalk Hill Unknown A Neotropical silverside related to the modern jack silverside. File:FMIB 51053 California "Smelt" or Pescadillo.jpeg
Bathylaginae indet. Pomona Freeway Chalk Hill Unknown A deep-sea smelt.
Borophryne B. cf. apogon LACM Locality 6202 Yorba Complete articulated skeleton A leftvent deep-sea anglerfish, potentially referable to the modern netdevil.[5] File:Borophryne apogon.jpg
Chaenophryne C. aff. melanorhabdus LACM Locality 6202 Yorba 4 complete articulated skeletons An oneirodid deep-sea anglerfish, potential affinities to the modern smooth dreamer.[5] File:Chaenophryne longiceps 2-transformed.jpeg
Chauliodus C. eximius Pomona Freeway Chalk Hill Unknown A viperfish. File:Chauliodus eximus LACM.jpg
Cyclothone C. sp. Pomona Freeway Chalk Hill Unknown A bristlemouth. File:Cyclothone microdon1.jpg
Decapterus D. cf. hopkinsi Continental Oil Company “Turnbull” well number 3 Lower One scale; lost A scad. File:Decapterus punctatus.jpg
D. sp. Pomona Freeway Chalk Hill Unknown
Etringus E. scintillans Puente Hills Two scales; lost A herring.
Ganoessus G. clepsydra Featherstone Quarry Unknown A herring.
G. meiklejohni Featherstone Quarry Articulated skeleton
Ganolytes G. cameo Pomona Freeway Chalk Hill Unknown A herring.
Genyonemus G. whistleri Pomona Freeway Chalk Hill Partial articulated specimen. A drumfish related to the white croaker. File:Genyonemus lineatus mspc102.jpg
Lampanyctus L. sp. Pomona Freeway Chalk Hill ">100 otoliths and several skeletal imprints with otoliths" A lanternfish. File:Lampanyctus macdonaldi.jpg
Leptacanthichthys L. cf. gracilispinis LACM Locality 6202 Yorba Articulated skeleton An oneirodid deep-sea anglerfish, potentially referable to the modern plainchin dreamarm.[5] File:Leptacanthichthys gracilispinis.JPG
Linophryne L. cf. indica LACM Locality 6202 Yorba Articulated skeleton A leftvent deep-sea anglerfish, potentially referable to the modern headlight angler.[5] File:L indica.JPG
Lompoquia L. sp. Upper Unknown A drumfish. File:Lompoquia retropes.JPG
Molidae indet. An ocean sunfish of uncertain affinities.
Moridae indet. Pomona Freeway Chalk Hill Unknown A codling of uncertain affinities.
Oneirodes O. sp. LACM Locality 6202 Yorba Articulated incomplete skeleton An oneirodid deep-sea anglerfish. File:Oneirodes macronema.JPG
Paralabrax P. sp. Pomona Freeway Chalk Hill Unknown A sand bass. File:Paralabrax clathratus 2.jpg
Pseudoseriola P. gilliandi A relative of the bluefish.
Sarda S. stockii Union Oil Company “Chapman” well number 29 Lower 2 scales A bonito. File:Sarda sarda.jpg
Scomber S. cf. japonicus Continental Oil Company “Turnbull” well number 3 Lower 1 scale, lost A mackerel, potentially referable to the modern chub mackerel. File:Scomber japonicus.png
S. sp. Pomona Freeway Chalk Hill Unknown A mackerel.
Seriphus S. lavenbergi City of Industry Yorba Disarticulated skull with otolith A drumfish related to the queenfish. File:Seriphus politus Mspc094.jpg
Symphurus S. sp. Santiago Road Overcrossing La Vida 6 partial skeletons A tonguefish. File:Symphurus pusillus.jpg
Syngnathus S. emeritus San Dimas Several articulated skeletons A pipefish. File:Syngnathus rostellatus.jpg
Thyrsocles T. kriegeri Pomona Freeway Chalk Hill Unknown A euzaphlegid. File:Euzaphlegidae.JPG
Xyne X. grex Pomona Freeway Chalk Hill Unknown A herring.
?Xyrinius X. houshi "Los Angeles" Unknown A herring, from either the Monterey or Puente Formations. Potentially conspecific with Xyne grex.
Zanteclites Z. hubbsi Covina, El Modena 6 specimens A Neotropical silverside.

See also

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References

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