Silverado Canyon Turritella-Alaria Association: Turonian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Mytilida
- Mytilidae
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Inoperna bellarugosa
Popenoe 1937
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Bivalvia
- Arcida
- Parallelodontidae
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Parallelodon sp.
Meek and Worthen 1866
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| "sp. A" | ||||||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris pacificus
(Anderson 1902)
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| recombined as Glycymeris pacifica | ||||||||||
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Bivalvia
- Arcida
- Limopsidae
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Limopsis silveradoensis
Packard 1922
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Bivalvia
- Ostreida
- Pinnidae
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Pinna calamitoides
Shumard 1858
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Bivalvia
- Pectinida
- Entoliidae
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Syncyclonema operculiformis
(Gabb 1864)
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Bivalvia
- Carditida
- Astartidae
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Eriphyla lapidis
(Packard 1922)
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Bivalvia
- Lucinida
- Mactromyidae
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Clisocolus corrugatus
Popenoe 1937
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Bivalvia
- Pholadida
- Corbulidae
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Corbula parilis
Gabb 1864
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| recombined as Caryocorbula parilis | ||||||||||
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Gastropoda
- Turritellidae
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Turritella chicoensis
Gabb 1864
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Gastropoda
- Neogastropoda
- Melongenidae
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Siphonalia dubius
Packard 1922
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| recombined as Saturnus dubius | ||||||||||
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Gastropoda
- Aporrhaidae
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Alaria nodosa
Packard 1922
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| recombined as Latiala nodosa | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Orange |
| Coordinates: | 33.8° North, 117.7° West (view map) | ||||
| Paleocoordinates: | 34.7° North, 81.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Turonian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Turonian | ||
| Age range of interval: | 93.90000 - 89.80000 m.y. ago |
Stratigraphy
| Formation: | Ladd | Member: | Holz Shale | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: from "about 1 m of strata" | |||||
Lithology and environment
| Primary lithology: | lithified siltstone |
| Secondary lithology: | lithified "shale" |
| Lithology description: "Brown to gray siltstone and shale with interbedded lenses of stringers of limestone, conglomerate, and sandstone" apparently well lithified because strata were "broken" and "disarticulated" during collection | |
| Environment: | interdistributary bay |
| Geology comments: "in normal marine waters at shallow depths (20 m if marine grasses were present)" the Holz Shale in general is "in a shallow marine setting, including prodelta, lagoonal and bay environments" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,surface (in situ),field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: "Bulk samples were collected... and brought back to the lab for disarticulation" but there was also "selective collecting, by breaking the strata at the site"
collections apparently are at the California State University at Fullerton | |
Metadata
| Also known as: | Locality 5 | ||
| Database number: | 80934 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2008-05-21 21:28:53 | Last modified: | 2008-05-22 13:51:36 |
| Access level: | the public | Released: | 2008-05-21 21:28:53 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 27237. | F. A. Sundberg. 1980. Late Cretaceous paleoecology of the Holz Shale, Orange County, California. Journal of Paleontology 54(4):840-857 [J. Alroy/J. Alroy] |