Loja shales: Middle Miocene, Ecuador
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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| Fruit, EPN 504 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Ecuador | State/province: | Loja | County: | Loja |
| Coordinates: | 4.0° South, 79.2° West (view map) | ||||
| Paleocoordinates: | 3.1° South, 75.5° West (Wright 2013) | ||||
| Basis of coordinate: | stated in text | ||||
| Altitude: | 2160 meters | ||||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Middle Miocene | ||
| Age range of interval: | 15.98 - 11.63 m.y. ago | ||
| Age estimate: | 10.7 ± 1.6 to 10.0 ± 1.4 Ma (fission track) |
Stratigraphy
| Formation: | San Cayetano | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: The fossils are derived from the Siltstone Member, dated at 10.7 ± 1.6 to 10.0 ± 1.4 Ma (Hungerbühler et al., 2002). | |||||
Lithology and environment
| Primary lithology: | "shale" |
| Includes fossils? | Y |
| Lithology description: One additional specimen was recovered from very fine lacustrine diatomitic shales in the San Cayetano Formation in the Loja Basin. | |
| Environment: | lacustrine - large |
| Geology comments: Hungerbühler et al. (2002) also interpreted the quiet water facies of the San Cayetano Formation as a "fresh-water lake situated in a tropical environment at low elevation". | |
Taphonomy
| Modes of preservation: | adpression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Museum repository: Escuela Politec- nica Nacional del Ecuador (EPN) | |
Metadata
| Database number: | 136237 | ||
| Authorizer: | C. Jaramillo | Enterer: | C. Martinez |
| Modifier: | C. Martinez | Research group: | paleobotany |
| Created: | 2012-11-24 03:39:05 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | group members | Released: | 2014-11-24 03:39:05 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 43581. | R. J. Burnham and N. L. Carranco. 2004. Miocene winged fruits of Loxopterygium (Anacardiaceae) from the Ecuadorian Andes. American Journal of Botany 91(11):1767-1773 [C. Jaramillo/C. Martinez/M. Uhen] |