USGS M4667, Smith Grade: Danian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Cidaroida
- Cidaridae
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Cidaris martinezensis
Kew 1920
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Echinoidea
- Spatangoida
- Hemiasteridae
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Periaster sp. n. sp.
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Echinoidea
- Spatangoida
- Paleopneustidae
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Pericosmus sp.
Agassiz 1847
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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Gastropoda
- Turritellidae
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Turritella pachecoensis
Stanton 1896
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Turritella infragranulata
Gabb 1864
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Gastropoda
- Neogastropoda
- Muricidae
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Perissolax tricarnatus
Weaver 1905
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| recombined as Pseudoperissolax tricarnatus | |||||||
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Bivalvia
- Nuculanida
- Nuculanidae
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Nuculana sp.
Link 1807
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Bivalvia
- Nuculida
- Nuculidae
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Acila sp.
Adams and Adams 1858
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Bivalvia
- Ostreida
- Pinnidae
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Pinna sp. n. sp.
Linnaeus 1758
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Bivalvia
- Arcida
- Cucullaeidae
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Cucullaea mathewsonii
Gabb 1864
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris sp.
Da Costa 1778
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Bivalvia
- Pholadomyida
- Pholadomyidae
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Pholadomya nasuta
Gabb 1864
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Bivalvia
- Lucinida
- Lucinidae
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Lucinoma sp.
Dall 1901
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| see common names | |||||||
Geography
| Country: | United States | State/province: | California | County: | Santa Cruz |
| Coordinates: | 37.0° North, 122.1° West (view map) | ||||
| Paleocoordinates: | 42.2° North, 99.8° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Paleocene |
| Stage: | Danian | 10 m.y. bin: | Cenozoic 1 |
| Key time interval: | Danian | ||
| Age range of interval: | 66.00000 - 61.60000 m.y. ago |
Stratigraphy
| Formation: | Locatelli | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: From lower part of formation. Oldest sedimentary sequence in Santa Cruz county; erosion remnants; as much as 240-270m of siltstone is preserved in area; rests unconformably upon crystaline basement - and is overlain unconformably by the Lompico Sandstone and Santa Margarita Sandstone | |||||
Lithology and environment
| Primary lithology: | micaceous,brown,gray,yellow poorly lithified siltstone |
| Includes fossils? | Y |
| Lithology description: Nodular olive-gray to pale-yellowish-brown micaceous siltstone; massive arkosic sandstone locally at base | |
| Environment: | offshore |
| Glacial or sequence phase: | transgressive |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some microfossils |
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | UCMP |
| Collection method comments: Also collections at USGS, Menlo Park | |
| Taxonomic list comments:Representative for molluscan, echinoid and arthropod taxa; does not include mentioned foraminifera | |
Metadata
| Database number: | 37389 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2004-03-14 20:54:02 | Last modified: | 2015-04-11 23:20:17 |
| Access level: | the public | Released: | 2004-03-14 20:54:02 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 10039. | J. C. Clark. 1981. Stratigraphy, paleontology, and geology of the Central Santa Cruz Mountains, California Coast Ranges. United States Geological Survey Professional Paper 1168:1-51 [A. Miller/A. Hendy/R. McClees-Funinan] |