Marble Mountains, near Cadiz (coll. Bradley and Mason 1934): Delamaran, California
collected by John H. Bradley and John F. Mason 1934
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Coeloscleritophora
- Chancelloriida
- Chancelloriidae
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Chancelloria eros
Walcott 1920
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Lingulata
- Lingulida
- Obolidae
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Westonia ella
Walcott 1912
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Paterinata
- Paterinida
- Paterinidae
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Iphidella pannula
(White 1874)
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recombined as Dictyonina pannula | |||||||
Rhynchonellata
- Orthida
- Bohemiellidae
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Billingsella highlandensis
(Walcott 1886)
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recombined as Wimanella highlandensis | |||||||
Hyolithida
- Hyolithidae
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Hyolithes sp.
d'Eichwald 1840
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Hyolithes princeps
Billings 1872
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recombined as Nevadotheca princeps | |||||||
Trilobita
- Corynexochida
- Corynexochidae
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Corynexochus ? sp.
Angelin 1854
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Trilobita
- Corynexochida
- Dorypygidae
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Dorypyge quadriceps
(Hall and Whitfield 1877)
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recombined as Kootenia quadriceps | |||||||
Trilobita
- Corynexochida
- Zacanthoididae
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Zacanthoides typicalis
(Walcott 1886)
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Trilobita
- Corynexochida
- Dolichometopidae
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Bathyuriscus maximus n. sp.
Mason 1935
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Dolichometopus productus
(Hall and Whitfield 1877)
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= Glossopleura mohavensis
Resser 1935
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Foster 2022 | ||||||
Bathyuriscus howelli
Walcott 1886
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recombined as Athabaskia howelli | |||||||
Anoria lodensis
(Clark 1921)
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recombined as Glossopleura lodensis | |||||||
Trilobita
- Asaphida
- Anomocarellidae
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Anomocarella ? spatha
Mason 1935
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Trilobita
- Ptychopariida
- Ptychopariidae
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Acrocephalites ? trifossatus
Mason 1935
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recombined as Caborcella trifossatus | |||||||
Trilobita
- Ptychopariida
- Alokistocaridae
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Amecephalus strangulatus n. sp.
Mason 1935
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Amecephalus piochensis
(Walcott 1886)
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Trilobita
- Ptychopariida
- Bolaspididae
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Alokistocare linnarssoni
(Walcott 1884)
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recombined as Eldoradia linnarssoni | |||||||
Agnostida
- Eodiscidae
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Pagetia clytia
Walcott 1916
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see common names |
Geography
Country: | United States | State/province: | California | County: | San Bernardino |
Coordinates: | 34.5° North, 115.5° West (view map) | ||||
Paleocoordinates: | 2.1° South, 96.9° West | ||||
Basis of coordinate: | estimated from map | ||||
Geographic resolution: | outcrop |
Time
Period: | Cambrian |
10 m.y. bin: | Cambrian 3 |
Key time interval: | Delamaran |
Age range of interval: | 511.00000 - 506.50000 m.y. ago |
Stratigraphy
Formation: | Cadiz | ||||
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: The stratigraphy of the formation has been fully dealt with in the reports of Hazzard and Hazzard and Mason. As established in the latter, the Cadiz formation consists of the upper 375 feet of the quartzite and shale unit originally noted as containing both Lower and Middle Cambrian fossils. The lower 100 feet of the unit as originally described is not included within the Cadiz formation as it is known to contain Mesonacidae. The exact contact between the Lower and Middle Cambrian beds has not been determined, but it is placed provisionally, at a buff, oolitic limestone and limy, glauconitic sandstone horizon about 100 feet above the top of the Lower Cambrian algal limestone. The fossils of the present report came from a thin-bedded limestone which weathers into small buff- colored blocks and plates, and from an underlying green shale. The thin-bedded limestone is immediately overlain by the heavy, dark gray limestone of the Bonanza King formation (Middle Cambrian). The green shale is probably not more than 50 feet lower in the formation. PJW: The Brisolia zone is now the Latham Shale
JDM: The "thin-bedded limestone" is the Middle Cambrian Cadiz Formation, green shale is the Dyeran Latham Shale. |
Lithology and environment
Primary lithology: | "limestone" |
Secondary lithology: | green "shale" |
Includes fossils? | Y |
Lithology description: The stratigraphy of the formation has been fully dealt with in the reports of Hazzard7 and Hazzard and Mason.8 As established in the latter, the Cadiz formation consists of the upper 375 feet of the quartzite and shale unit originally noted as containing both Lower and Middle Cambrian fossils. The lower 100 feet of the unit as originally described is not included within the Cadiz formation as it is known to contain Mesonacidae. The exact contact between the Lower and Middle Cambrian beds has not been determined, but it is placed provisionally, at a buff, oolitic limestone and limy, glauconitic sandstone horizon about 100 feet above the top of the Lower Cambrian algal limestone. The fossils of the present report came from a thin-bedded limestone which weathers into small buff- colored blocks and plates, and from an underlying green shale. The thin-bedded limestone is immediately overlain by the heavy, dark gray limestone of the Bonanza King formation (Middle Cambrian). The green shale is probably not more than 50 feet lower in the formation. | |
Environment: | marine indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
Reason for describing collection: | general faunal/floral analysis | ||
Collectors: | John H. Bradley and John F. Mason | Collection dates: | 1934 |
Metadata
Database number: | 191414 | ||
Authorizer: | J. Marcot | Enterer: | J. Marcot |
Modifier: | J. Marcot | Research group: | marine invertebrate |
Created: | 2018-01-28 19:36:05 | Last modified: | 2023-04-04 17:40:53 |
Access level: | the public | Released: | 2018-01-28 19:36:05 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
64594. | J. F. Mason. 1935. Fauna of the Cambrian Cadiz Formation, Marble Mountains, California. Bulletin of the Southern California Academy of Sciences 34(2):97-120 [J. Marcot/J. Marcot] |
Secondary references:
84267 | J. R. Foster. 2022. Continuous character variation within the Glossopleura-Anoria-Sonoraspis plexus: Dolichometopid trilobites from the Cadiz Formation (Cambrian: Miaolingian, Wuliuan), California. Palaeontologia Electronica 25(2):a18 [J. Marcot/J. Marcot] |