Lo Valdés Formation, Rio Volcán, Santiago Province, Units I-III: Tithonian, Chile
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Nuculanida
- Nuculanidae
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Nuculana sp.
Link 1807
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Bivalvia
- Carditida
- Astartidae
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Eriphyla argentina
Burckh and Weaver 1907
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Bivalvia
- Pholadomyida
- Pholadomyidae
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Pholadomya gigantea
(Sowerby 1836)
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopaea dupinian
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| corrected as Panopea | |||||||
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Bivalvia
- Lucinida
- Lucinidae
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"Lucina" leufuensis
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Bivalvia
- Trigoniida
- Trigoniidae
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Trigonia cf. carinata
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Bivalvia
- Trigoniida
- Megatrigoniidae
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Anditrigonia eximia
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Pterotrigonia coihucoensis
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Bivalvia
- Trigoniida
- Myophorellidae
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Steinmanella transitoria
Steinmann 1881
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Bivalvia
- Mytilida
- Mytilidae
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Modiolus sp.
(Lamarck 1801)
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra imbricata
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Bivalvia
- Ostreida
- Ostreidae
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"Ostrea" lotenoensis
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Bivalvia
- Pectinida
- Limidae
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Plagiostoma sp.
Sowerby 1814
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Ctenostreon neuquensis
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus sp.
Sowerby 1814
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Bivalvia
- Arcida
- Cucullaeidae
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Cucullaea gabrielis
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| see common names | |||||||
Geography
| Country: | Chile |
| Coordinates: | 33.8° South, 70.1° West (view map) |
| Paleocoordinates: | 32.0° South, 33.3° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | local area |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| Stage: | Tithonian | 10 m.y. bin: | Jurassic 6 |
| Key time interval: | Tithonian | ||
| Age range of interval: | 149.20000 - 145.00000 m.y. ago |
Stratigraphy
| Geological group: | Mendoza | Formation: | Lo Valdés | Member: | Units I-III |
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Unit I: 625 m.
Unit II: 130 m. Unit III: 65 m. | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal lithified grainstone | ||
| Secondary lithology: | lithified sandy "limestone" | ||
| Lithology description: Sequence mainly composed of biosparite limestone and sandy limestone. | |||
| Environment: | open shallow subtidal | Tectonic setting: | back-arc basin |
| Geology comments: shallow-water facies; shallow back-arc basin | |||
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 57144 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | S. Nurnberg | Research group: | marine invertebrate |
| Created: | 2005-12-06 01:22:43 | Last modified: | 2006-03-23 13:20:04 |
| Access level: | the public | Released: | 2005-12-06 01:22:43 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 12505. | A. Hallam, L. Biró-Bagóczky, and E. Perez. 1986. Facies analysis of the Lo Valdés Formation (Tithonian-Hauterivian) of the High Cordillera of Central Chile, and the palaeogeographic evolution of the Andean Basin. Geological Magazine 123(4):425-435 [M. Aberhan/S. Nurnberg/S. Nurnberg] |