Bloomfield Quarry: Tortonian - Piacenzian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Desmondia sp.
Reptilia
Aves indet. Linnaeus 1758
Smith et al. 2017
Reptilia - Charadriiformes
Panalcidae indet. Smith 2011
Smith et al. 2017
Reptilia - Charadriiformes - Alcidae
Mancallinae indet. (Miller 1946)
Smith et al. 2017
cf. Uria brodkorbi Howard 1981
Smith et al. 2017
Mammalia - Sirenia
Sirenia indet. (Illiger 1811)
Mammalia - Carnivora - Odobenidae
cf. Pontolis sp. True 1905
Smith et al. 2017
Dusignathinae indet. Mitchell 1968
Gomphotaria pugnax Barnes and Raschke 1991
Smith et al. 2017
Dusignathus santacruzensis Kellogg 1927
Smith et al. 2017
Odobeninae indet. Allen 1880
Smith et al. 2017
cf. Imagotaria sp. Mitchell 1968
Smith et al. 2017
Mammalia - Cetacea
Odontoceti indet. Flower 1867
Smith et al. 2017
Mysticeti indet. Cope 1891
Mammalia - Cetacea - Cetotheriidae
Herpetocetinae indet. Steeman 2007
Smith et al. 2017
Mammalia - Cetacea - Balaenopteridae
Balaenopteridae indet. Gray 1864
Smith et al. 2017
Actinopteri - Salmoniformes - Salmonidae
Oncorhynchus sp. Suckley 1860
Actinopteri - Polyprionidae
Stereolepis sp. Ayres 1859
Actinopteri - Perciformes - Scorpaenidae
Sebastes sp. Cuvier 1829
Actinopteri - Embiotocidae
Embiotocidae indet.
Actinopteri - Pleuronectiformes - Paralichthyidae
Paralichthys sp. Girard 1858
Actinopteri - Scombriformes - Scombridae
Sarda sp. Lacépède 1802
Smith et al. 2017
Actinopteri - Gadiformes - Merlucciidae
Merluccius sp. Rafinesque 1810
Smith et al. 2017
Actinopteri - Clupeiformes - Clupeoidei
Sardinops sp. Hubbs 1929
Smith et al. 2017
Chondrichthyes - Myliobatiformes - Myliobatidae
Myliobatis californica
Chondrichthyes - Lamniformes - Lamnidae
Isurus oxyrhynchus (Rafinesque 1810)
Smith et al. 2017
original and current combination Isurus oxyrinchus
Chondrichthyes - Lamniformes - Cetorhinidae
Cetorhinus maximus (Gunner 1765)
Smith et al. 2017
Chondrichthyes - Squalomorphii - Hexanchidae
Hexanchus griseus
Smith et al. 2017
Gastropoda - Trochidae
Trochidae indet. Rafinesque 1815
Gastropoda - Neritidae
Neritidae indet. Rafinesque 1815
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula sp. Lamarck 1799
Crepidula princeps Conrad 1855
Trochita cf. diabloensis (Clark 1915)
Gastropoda - Naticidae
Naticidae indet. Guilding 1834
Gastropoda - Neogastropoda
Neogastropoda indet. Thiele 1929
Gastropoda - Neogastropoda - Nassariidae
Nassariidae indet. Iredale 1916
Caesia grammatus (Dall 1917)
Gastropoda - Neogastropoda - Siphonaliidae
? Lirabuccinum sp. Vermej 1991
Gastropoda - Neogastropoda - Muricidae
? Ocenebra sp. Leach in Gray 1847
? Nucella sp.
Nucella cf. etchegoinensis (Arnold 1909)
n. sp.
Bivalvia - Nuculanida - Yoldiidae
Yoldia sp. Möller 1842
Bivalvia - Mytilida - Mytilidae
Mytilidae indet. Rafinesque 1815
Modiolus sp. (Lamarck 1801)
Crenomytilus cf. coalingensis (Arnold 1909)
Bivalvia - Pectinida - Pectinidae
Chlamys sp. Röding 1798
Chlamys cf. hodgei (Hertlein 1925)
Chlamys cf. hastata (Sowerby 1842)
Chlamys aff. egregius (Nomland 1917)
Swiftopecten parmeleei (Dall 1898)
Patinopecten sp. (Dall 1898)
Bivalvia - Pectinida - Anomiidae
Anomia peruviana d'Orbigny 1846
Pododesmus cf. macrochisma (Deshayes 1839)
recombined as Pododesmus (Monia) macrochisma
Bivalvia - Arcida - Arcidae
Arca cf. santamariensis Reinhart 1937
Anadara sp. Gray 1847
Bivalvia - Cardiida - Cardiidae
Cardiidae indet. Lamarck 1809
? Clinocardium sp. Keen 1936
Bivalvia - Cardiida - Tellinidae
Tellina sp. Linnaeus 1758
Macoma sp. Leach 1819
Macoma aff. indentata Carpenter 1864
recombined as Macoma (Rexithaerus) indentata
Bivalvia - Cardiida - Mactridae
Mactridae indet. Lamarck 1809
Tresus pajaroanus (Conrad 1857)
Bivalvia - Pholadida - Myidae
Cryptomya californica (Conrad 1837)
Bivalvia - Pholadida - Teredinidae
Teredo sp. Linnaeus 1758
Bivalvia - Solenida - Pharidae
? Siliqua sp. Mühlfeld 1811
Ensis sp. Schumacher 1817
Bivalvia - Solenida - Solenidae
Solen sp. Linnaeus 1758
Bivalvia - Hiatellida - Hiatellidae
Panopea abrupta (Conrad 1849)
Bivalvia - Lucinida - Lucinidae
Lucinoma annulatum (Reeve 1850)
Malacostraca - Decapoda - Cancridae
Cancer sp. Linnaeus 1758
Thecostraca - Balanomorpha - Balanidae
Balanus irradians
Balanus cf. irradians
? Balanus sp. Da Costa 1778
Balanus aff. nubilus Darwin 1854
see common names

Geography
Country:United States State/province:California County:Sonoma
Coordinates: 38.3° North, 122.8° West (view map)
Paleocoordinates:38.2° North, 120.4° West
Basis of coordinate:estimated from map
Time
Period:Neogene
10 m.y. bin:Cenozoic 6
Key time interval:Tortonian - Piacenzian
Age range of interval:11.63000 - 2.58000 m.y. ago
Age estimate:7.92 Ma (Sr isotope)
Stratigraphy
Formation:Wilson Grove
Stratigraphy comments: The data presented above indicate that the lower part (below the Roblar tuff) of the Wilson Grove Formation is late Miocene in age, between <9.27±0.06 Ma and >6.203±0.011 Ma, whereas in its upper part (above the Roblar tuff) an age range between 6.203±0.011 Ma to possibly as young as
>2.6 Ma (late Pliocene; Powell and others, 2004) is deter- mined. This age range includes the “Jacalitos” CPMS for the lower unit to possibly the “San Joaquin” CPMS for the upper unit and overall overlaps the upper part of the Tortonian and lower part of the Messinian to the Piacenzian stages of the International Chronostratigraphic Chart (International Com- mission on Stratigraphy, 2012).
Lithology and environment
Primary lithology:medium calcareous sandstone
Includes fossils?Y
Lithology description: The Wilson Grove section above the Franciscan Complex begins with a 0.3- to 0.6-m-thick basal conglomerate containing abundant sand with pebble-to cobble-size clasts of the Franciscan Complex rock and abundant disarticulated fossil shell fragments in an upward fining, gritty sandstone, which pinches out to the south. The basal conglomerate is conformably overlain by about 5 m of less fossiliferous, massive-bedded, friable to locally calcite- cemented, fine- to medium-grained, very well-sorted, sandstone. The aforementioned outcrop at the quarry is capped by about a meter of soil.
Environment:shallow subtidal indet.
Geology comments: rocky intertidal or shallow subtidal environment exposed to moderate to heavy surf.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:CAS 54135, CAS 54126, CAS 57867
Database number:188305
Authorizer:M. Uhen Enterer:M. Uhen
Modifier:J. Marcot Research group:vertebrate
Created:2017-08-28 08:42:41 Last modified:2024-04-07 15:16:53
Access level:the public Released:2017-08-28 08:42:41
Creative Commons license:CC BY
Reference information

Primary reference:
61707. C. L. Powell, R. W. Boessenecker, N. A. Smith, R. J. Fleck, S. J. Carlson, J. R. Allen, D. J. Long, A. M. Sarna-Wojcicki, and R. B. Guruswami-Naidu. 2019. Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California. Scientific Investigations Report 2019(5021):1-77 [M. Uhen/B. Shipps/M. Uhen]

Secondary references:

63143 N. A. Smith, R. W. Boessenecker, D. Long and C. Powell. 2017. A new marine vertebrate assemblage from the Wilson Grove Formation at Bloomfield Quarry (Late Miocene), Sonoma County, California. Society of Vertebrate Paleontology Program and Abstracts 2017:195-196 [M. Uhen/M. Uhen/M. Uhen]