A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California
A relatively diverse assemblage of at least 17 vertebrates (three species of sharks, three genera of teleost fishes, nine marine mammals, and at least two species of bird) is reported from the basal Wilson Grove Formation in a small quarry just north of the town of Bloomfield in Sonoma County, Calif...
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ftstmaryscollir:oai:digitalcommons.stmarys-ca.edu:school-science-faculty-works-1154 2023-10-01T03:55:22+02:00 A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California Smith, N. Adam Boessenecker, Robert Long, Douglas Powell, Charles, II 2017-01-01T08:00:00Z https://digitalcommons.stmarys-ca.edu/school-science-faculty-works/155 https://www.researchgate.net/publication/319337803_A_new_marine_vertebrate_assemblage_from_the_Wilson_Grove_Formation_at_Bloomfield_Quarry_late_Miocene_Sonoma_County_California unknown Saint Mary's Digital Commons https://digitalcommons.stmarys-ca.edu/school-science-faculty-works/155 https://www.researchgate.net/publication/319337803_A_new_marine_vertebrate_assemblage_from_the_Wilson_Grove_Formation_at_Bloomfield_Quarry_late_Miocene_Sonoma_County_California School of Science Faculty Works Biology text 2017 ftstmaryscollir 2023-09-02T18:40:16Z A relatively diverse assemblage of at least 17 vertebrates (three species of sharks, three genera of teleost fishes, nine marine mammals, and at least two species of bird) is reported from the basal Wilson Grove Formation in a small quarry just north of the town of Bloomfield in Sonoma County, California. The vertebrate, as well as associated invertebrate, assemblages suggest intertidal to shallow subtidal water depths and water temperatures interpreted from the fauna are consistent with the latitude of the fossil locality (37°N) during the late Miocene. A single Sr isotope age determination of 7.92 Ma is consistent with other age determinations bounding the deposits and with interpretations based on vertebrate and invertebrate biostratigraphic data. The age of these vertebrate remains facilitates comparisons with better-known Miocene vertebrate assemblages from other parts of western coastal North America. The ichthyofauna is indicative of the relatively recent northeastern Pacific assemblages that originated in the late Miocene, and each of the species of sharks (Hexanchus griseus, Cetorhinus maximus, Isurus oxyrhynchus) and genera of bony fishes (Sardinops, Merluccius, Sarda) collected at this site, are still found in California coastal waters. The marine mammals from this location include the most diverse walrus assemblage yet reported in the world, including Dusignathus santacruzensis, Gomphotaria pugnax, Imagotaria sp., cf. Pontolis, and Odobeninae indet. Indeterminate odontocetes, balaenopterid and herpetocetine mysticetes, and an indeterminate hydrodamaline sea cow are also reported. The marine mammal assemblage has affinities with those from the Capistrano, Purisima, and San Mateo formations of California. Bird remains are reported from the Wilson Grove Formation herein for the first time. There are at least two species of bird represented by five specimens from the Bloomfield Quarry location. These specimens have been referred to Aves indet., Pan-Alcidae indet., Mancallinae indet., and cf. Uria ... Text Cetorhinus maximus uria walrus* Saint Mary's College of California (SMC) Digital Commons Pacific |
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Saint Mary's College of California (SMC) Digital Commons |
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topic |
Biology |
spellingShingle |
Biology Smith, N. Adam Boessenecker, Robert Long, Douglas Powell, Charles, II A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California |
topic_facet |
Biology |
description |
A relatively diverse assemblage of at least 17 vertebrates (three species of sharks, three genera of teleost fishes, nine marine mammals, and at least two species of bird) is reported from the basal Wilson Grove Formation in a small quarry just north of the town of Bloomfield in Sonoma County, California. The vertebrate, as well as associated invertebrate, assemblages suggest intertidal to shallow subtidal water depths and water temperatures interpreted from the fauna are consistent with the latitude of the fossil locality (37°N) during the late Miocene. A single Sr isotope age determination of 7.92 Ma is consistent with other age determinations bounding the deposits and with interpretations based on vertebrate and invertebrate biostratigraphic data. The age of these vertebrate remains facilitates comparisons with better-known Miocene vertebrate assemblages from other parts of western coastal North America. The ichthyofauna is indicative of the relatively recent northeastern Pacific assemblages that originated in the late Miocene, and each of the species of sharks (Hexanchus griseus, Cetorhinus maximus, Isurus oxyrhynchus) and genera of bony fishes (Sardinops, Merluccius, Sarda) collected at this site, are still found in California coastal waters. The marine mammals from this location include the most diverse walrus assemblage yet reported in the world, including Dusignathus santacruzensis, Gomphotaria pugnax, Imagotaria sp., cf. Pontolis, and Odobeninae indet. Indeterminate odontocetes, balaenopterid and herpetocetine mysticetes, and an indeterminate hydrodamaline sea cow are also reported. The marine mammal assemblage has affinities with those from the Capistrano, Purisima, and San Mateo formations of California. Bird remains are reported from the Wilson Grove Formation herein for the first time. There are at least two species of bird represented by five specimens from the Bloomfield Quarry location. These specimens have been referred to Aves indet., Pan-Alcidae indet., Mancallinae indet., and cf. Uria ... |
format |
Text |
author |
Smith, N. Adam Boessenecker, Robert Long, Douglas Powell, Charles, II |
author_facet |
Smith, N. Adam Boessenecker, Robert Long, Douglas Powell, Charles, II |
author_sort |
Smith, N. Adam |
title |
A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California |
title_short |
A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California |
title_full |
A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California |
title_fullStr |
A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California |
title_full_unstemmed |
A New Marine Vertebrate Assemblage From the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California |
title_sort |
new marine vertebrate assemblage from the wilson grove formation at bloomfield quarry (late miocene), sonoma county, california |
publisher |
Saint Mary's Digital Commons |
publishDate |
2017 |
url |
https://digitalcommons.stmarys-ca.edu/school-science-faculty-works/155 https://www.researchgate.net/publication/319337803_A_new_marine_vertebrate_assemblage_from_the_Wilson_Grove_Formation_at_Bloomfield_Quarry_late_Miocene_Sonoma_County_California |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Cetorhinus maximus uria walrus* |
genre_facet |
Cetorhinus maximus uria walrus* |
op_source |
School of Science Faculty Works |
op_relation |
https://digitalcommons.stmarys-ca.edu/school-science-faculty-works/155 https://www.researchgate.net/publication/319337803_A_new_marine_vertebrate_assemblage_from_the_Wilson_Grove_Formation_at_Bloomfield_Quarry_late_Miocene_Sonoma_County_California |
_version_ |
1778523802135691264 |