Tongoy area, Coquimbo Formation, Unit 15: Calabrian, Chile
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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Gastropoda
- Neogastropoda
- Muricidae
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Acanthina unicornis
(Bruguiére 1789)
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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| pelecypods | ||||||||||
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Thecostraca
- Balanomorpha
- Balanidae
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Balanus sp.
Da Costa 1778
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| see common names | ||||||||||
Geography
| Country: | Chile |
| Coordinates: | 30.3° South, 71.5° West (view map) |
| Paleocoordinates: | 30.4° South, 71.2° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | local area |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Calabrian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Calabrian | ||
| Age range of interval: | 1.80000 - 0.77400 m.y. ago |
Stratigraphy
| Formation: | Coquimbo | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Unit 15 was Sr dated at 1.4 Ma | |||||
Lithology and environment
| Primary lithology: | lithified conglomerate |
| Secondary lithology: | lithified calcareous conglomerate |
| Lithology description: conglomerate, calcareous conglomerate, wellcemented massive coquina, sandstone, siltstone, mudstone | |
| Environment: | shoreface |
| Geology comments: The coquina are interpreted as nearshore (upper shoreface) deposits because of their high fossil content. In the Tongoy paleobay, this facies represents shelly shoals and channels, but more distant from the river mouth than Units 8, 10 and 13. | |
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: | 68323 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2007-01-16 00:40:40 | Last modified: | 2007-07-03 12:19:09 |
| Access level: | the public | Released: | 2007-01-16 00:40:40 |
| 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] |