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Pomerado Conglomerate

The Pomerado Conglomerate Formation is a geologic formation in southwestern San Diego County, California.[1][2]

Pomerado Conglomerate Formation
Stratigraphic range: Late Eocene
TypeGeologic formation
OverliesMission Valley Formation
Thickness0–55 metres (0–180 ft)
Lithology
Primaryconglomerate
Location
RegionSan Diego County, California
Country United States
Type section
Named forPomerado Road

It was named for exposures located along Pomerado Road, at the divide between Carroll Canyon and Poway Valley.[1]

Geology edit

The Pomerado Conglomerate is of the Late Eocene Epoch, and is a massive cobble conglomerate. It is lithologically identical to the local Stadium Conglomerate.[1]

It overlies the sandstone Mission Valley Formation.[1] It is the uppermost formation of the Poway Group, and has a maximum thickness of 55 metres (180 ft).[1]

Fossil content edit

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

The Pomerado Conglomerate preserves fossils dating back to the Late Eocene Epoch of the Paleogene period, during the Cenozoic Era.[3]

Mammals edit

Ferae edit

Ferae reported from the Pomerado Conglomerate
Genus Species Presence Material Notes Images
Carnivoraformes undet. Genus B SDSNH locality 3757, Scripps Ranch North Site 57, Miramar Sandstone Member.[4] SDSNH 56335, cranium with right and left P4-M2.[4]
Hyaenodon cf. H. sp. Upper Member.[5] "SDSNH 60554, right maxillary fragment with P3–P4".[5] Specimen reidentified as the nimravid Pangurban.
Pangurban P. egiae Upper Member.[5] "SDSNH 60554, right maxillary fragment with P3–P4".[5] A nimravid, originally reported as cf. Hyaenodon sp.

Rodents edit

Rodents reported from the Pomerado Conglomerate
Genus Species Presence Material Notes Images
Nonomyinae Indeterminate Isolated m1 (SDSNH 72232).[6] "An unnamed new taxon of nonomyine morphologically intermediate between Nonomys and Diplolophus."[6]
Nonomys N. gutzleri Isolated teeth.[6] A myomorph.


See also edit

References edit

  1. ^ a b c d e Kennedy, Michael P. (1975). Geology of the San Diego metropolitan area, California. California Division of Mines and Geology.
  2. ^ Geiconsultants.com: Geologic Formations of Western San Diego County[permanent dead link], by Jeffrey D. Brown, R.G., C.E.G. − circa 1996.
  3. ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
  4. ^ a b Tomiya, Susumu (2013-05-20). "New carnivoraforms (Mammalia) from the middle Eocene of California, USA, and comments on the taxonomic status of 'Miacis' gracilis". Palaeontologia Electronica. 16 (2): 1–14. doi:10.26879/364. ISSN 1094-8074.
  5. ^ a b c d Poust, Ashley W.; Barrett, Paul Z.; Tomiya, Susumu (2022). "An early nimravid from California and the rise of hypercarnivorous mammals after the middle Eocene climatic optimum". Biology Letters. 18 (10): 20220291. doi:10.1098/rsbl.2022.0291. hdl:2433/276689. PMC 9554728. S2CID 252818430.
  6. ^ a b c Walsh, Stephen L. (September 2010). "New myomorph rodents from the Eocene of Southern California". Journal of Vertebrate Paleontology. 30 (5): 1610–1621. Bibcode:2010JVPal..30.1610W. doi:10.1080/02724634.2010.501433. S2CID 129569996.

Further reading edit

  • "General Plan Final Program EIR: 3.11 Paleontological Resources" (PDF). City of San Diego.


pomerado, conglomerate, formation, geologic, formation, southwestern, diego, county, california, formationstratigraphic, range, late, eocenetypegeologic, formationoverliesmission, valley, formationthickness0, metres, lithologyprimaryconglomeratelocationregions. The Pomerado Conglomerate Formation is a geologic formation in southwestern San Diego County California 1 2 Pomerado Conglomerate FormationStratigraphic range Late EoceneTypeGeologic formationOverliesMission Valley FormationThickness0 55 metres 0 180 ft LithologyPrimaryconglomerateLocationRegionSan Diego County CaliforniaCountry United StatesType sectionNamed forPomerado RoadIt was named for exposures located along Pomerado Road at the divide between Carroll Canyon and Poway Valley 1 Contents 1 Geology 2 Fossil content 2 1 Mammals 2 1 1 Ferae 2 1 2 Rodents 3 See also 4 References 5 Further readingGeology editThe Pomerado Conglomerate is of the Late Eocene Epoch and is a massive cobble conglomerate It is lithologically identical to the local Stadium Conglomerate 1 It overlies the sandstone Mission Valley Formation 1 It is the uppermost formation of the Poway Group and has a maximum thickness of 55 metres 180 ft 1 Fossil content editColor keyTaxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon Notes Uncertain or tentative taxa are in small text crossed out taxa are discredited The Pomerado Conglomerate preserves fossils dating back to the Late Eocene Epoch of the Paleogene period during the Cenozoic Era 3 Mammals edit Ferae edit Ferae reported from the Pomerado ConglomerateGenus Species Presence Material Notes ImagesCarnivoraformes undet Genus B SDSNH locality 3757 Scripps Ranch North Site 57 Miramar Sandstone Member 4 SDSNH 56335 cranium with right and left P4 M2 4 Hyaenodon cf H sp Upper Member 5 SDSNH 60554 right maxillary fragment with P3 P4 5 Specimen reidentified as the nimravid Pangurban Pangurban P egiae Upper Member 5 SDSNH 60554 right maxillary fragment with P3 P4 5 A nimravid originally reported as cf Hyaenodon sp Rodents edit Rodents reported from the Pomerado ConglomerateGenus Species Presence Material Notes ImagesNonomyinae Indeterminate Isolated m1 SDSNH 72232 6 An unnamed new taxon of nonomyine morphologically intermediate between Nonomys and Diplolophus 6 Nonomys N gutzleri Isolated teeth 6 A myomorph See also edit nbsp Paleontology portal nbsp California portal nbsp Earth sciences portalGeology of San Diego County California Paleogene Period in California List of fossiliferous stratigraphic units in California Paleontology in CaliforniaReferences edit a b c d e Kennedy Michael P 1975 Geology of the San Diego metropolitan area California California Division of Mines and Geology Geiconsultants com Geologic Formations of Western San Diego County permanent dead link by Jeffrey D Brown R G C E G circa 1996 Various Contributors to the Paleobiology Database Fossilworks Gateway to the Paleobiology Database Retrieved 17 December 2021 a b Tomiya Susumu 2013 05 20 New carnivoraforms Mammalia from the middle Eocene of California USA and comments on the taxonomic status of Miacis gracilis Palaeontologia Electronica 16 2 1 14 doi 10 26879 364 ISSN 1094 8074 a b c d Poust Ashley W Barrett Paul Z Tomiya Susumu 2022 An early nimravid from California and the rise of hypercarnivorous mammals after the middle Eocene climatic optimum Biology Letters 18 10 20220291 doi 10 1098 rsbl 2022 0291 hdl 2433 276689 PMC 9554728 S2CID 252818430 a b c Walsh Stephen L September 2010 New myomorph rodents from the Eocene of Southern California Journal of Vertebrate Paleontology 30 5 1610 1621 Bibcode 2010JVPal 30 1610W doi 10 1080 02724634 2010 501433 S2CID 129569996 Further reading edit General Plan Final Program EIR 3 11 Paleontological Resources PDF City of San Diego nbsp This article about a specific stratigraphic formation in California is a stub You can help Wikipedia by expanding it vte This article related to the Paleogene period is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Pomerado Conglomerate amp oldid 1216294015, wikipedia, wiki, book, books, library,

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