Tongoy area, Coquimbo Formation, Unit 10: Messinian, Chile
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Thecostraca
- Balanomorpha
- Balanidae
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Balanus sp.
Da Costa 1778
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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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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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Geography
| Country: | Chile |
| Coordinates: | 30.3° South, 71.5° West (view map) |
| Paleocoordinates: | 30.6° South, 69.9° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Messinian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Messinian | ||
| Age range of interval: | 7.24600 - 5.33300 m.y. ago |
Stratigraphy
| Formation: | Coquimbo | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: assuming a constant rate of sedimentation, mean ages close to 7.3 and 6.3 Ma can be respectively assigned to Units 9 and 10 | |||||
Lithology and environment
| Primary lithology: | poorly lithified conglomerate |
| Secondary lithology: | pebbly,brown,gray lithified sandstone |
| Includes fossils? | Y |
| Lithology description: poorly consolidated conglomerate, brownish gray sandstone (10% pebbles) | |
| Environment: | shoreface |
| Geology comments: The presence of thick-shelled shallow marine fossils as well as cetacean bones within this facies, indicates an upper shoreface environment. The facies is considered to represent fluvio-estuarine conditions near local river mouths. | |
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: | 68270 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2007-01-12 11:37:20 | Last modified: | 2007-07-03 12:19:09 |
| Access level: | the public | Released: | 2007-01-12 11:37:20 |
| 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] |