Tongoy area, Coquimbo Formation, Unit 4: Serravallian - Tortonian, Chile
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Vertebrata indet.
Lamarck 1801
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| fish scales | ||||||||||
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Mammalia
- Cetacea
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Cetacea indet.
Brisson 1762
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| cetacean bones | ||||||||||
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Chondrichthyes
- Lamniformes
- Lamnidae
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Cosmopolitodus hastalis
(Agassiz 1838)
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| recombined as Carcharodon hastalis | ||||||||||
| teeth | ||||||||||
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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unclassified
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Porifera indet.
Grant 1836
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| sponge spicules | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Chile |
| Coordinates: | 30.3° South, 71.5° West (view map) |
| Paleocoordinates: | 30.7° South, 68.6° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Miocene |
| Key time interval: | Serravallian - Tortonian | ||
| Age range of interval: | 13.82000 - 7.24600 m.y. ago |
Stratigraphy
| Formation: | Coquimbo | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Unit 4 has a mean age close to 11.2 Ma | |||||
Lithology and environment
| Primary lithology: | planar lamination,diatomaceous,tuffaceous poorly lithified claystone |
| Secondary lithology: | lithified siltstone |
| Lithology description: tuffaceous and diatomaceous clay, lower flow regime planar laminae, siltstone, sandstone, phosphate pebble bed | |
| Environment: | offshore |
| Geology comments: The very fine grain size of this unit suggests a low-energy, relatively deep-water environment... considered to represent inner bay sediments in relatively deep water (100-140 m). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 68264 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2007-01-12 05:49:11 | Last modified: | 2007-07-03 12:19:09 |
| Access level: | the public | Released: | 2007-01-12 05:49:11 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 19640. | J. P. Le Roux, D. M. Olivares, S. N. Nielsen, N. D. Smith, H. Middleton, J. Fenner, and S. E. Ishman. 2006. Bay sedimentation as controlled by regional crustal behaviour, local tectonics and eustatic sea-level changes: Coquimbo Formation (Miocene-Pliocene), Bay of Tongoy, central Chile. Sedimentary Geology 184:133-153 [M. Aberhan/S. Nurnberg] |