Laguna del Hunco: quarry LH3: Ypresian, Argentina
collected by P. Wilf, N.R. Cuneo, K.R. Johnson, P. Puerta, M. A. Gandolfo 1999, 2002, 2004
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Pteridopsida
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Magnoliopsida
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| 1 specimen | ||||||||||
| Berry | ||||||||||
| 3 specimens | ||||||||||
| Berry | ||||||||||
| 1 specimen | ||||||||||
| 2 specimens | ||||||||||
| 1 specimen | ||||||||||
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Magnoliopsida informal TY085 fertile axis
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1 specimen | |||||||||
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Magnoliopsida informal TY100 seed/fruit
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1 specimen | |||||||||
| 1 specimen | ||||||||||
| Berry | ||||||||||
| 3 specimens | ||||||||||
| Berry | ||||||||||
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Angiospermae
- Myrtales
- Myrtaceae
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"Myrcia" chubutensis leaf
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1 specimen | |||||||||
| Berry | ||||||||||
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= Eucalyptus frenguelliana leaf
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Hermsen et al. 2012 | |||||||||
| Gandolfo and Zamaloa | ||||||||||
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Angiospermae
- Fabales
- Fabaceae
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Fabaceae informal TY091 seed/fruit
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1 specimen | |||||||||
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Angiospermae
- Laurales
- Lauraceae
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| 3 specimens | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 42.5° South, 70.0° West (view map) | ||
| Paleocoordinates: | 43.9° South, 59.5° West (Wright 2013) | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Ypresian | 10 m.y. bin: | Cenozoic 2 |
| Key time interval: | Ypresian | ||
| Age range of interval: | 56 - 48.07 m.y. ago | ||
| Age estimate: | 52.22 ± 0.22 Ma (Ar/Ar) |
Stratigraphy
| Formation: | Huitrera | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: See P. Wilf et al. 2003, Science suppl., for detailed lithostratigraphy, paleomagnetic stratigraphy, and first Ar-Ar ages. See P. Wilf et al. 2012 (American Journal of Botany) for the revised Ar-Ar age given above. | |||||
Lithology and environment
| Primary lithology: | fine,tuffaceous,gray lithified silty,sandy "siliciclastic" | ||
| Includes fossils? | Y | ||
| Lithology description: See Wilf et al. 2003, Science suppl., for complete lithologic summary. | |||
| Environment: | crater lake | Tectonic setting: | volcanic basin |
| Geology comments: Large caldera-lake, embedded in the Eocene middle Chubut River volcanic pyroclastic complex. See E. Aragon and M.M. Mazzon, Rev. Asoc. Geol. Argent. 52(3):243-256 (1997). | |||
Taphonomy
| Modes of preservation: | adpression,original silica,original carbon,replaced with silica |
| Size of fossils: | macrofossils,mesofossils,microfossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | very poor |
| Abundance in sediment: | abundant |
| Size sorting: | medium |
| Fragmentation: | frequent |
| Bioerosion: | none |
| Feeding/predation traces: | punctures,external foliage feeding,arthropod mining,arthropod galling,arthropod boring,piercing/sucking,oviposition |
| Temporal resolution: | time-averaged |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection excludes: | all microfossils,some macrofossils | ||
| Collection methods: | bulk,selective quarrying,mechanical,field collection | ||
| Reason for describing collection: | paleoecologic analysis | ||
| Museum repositories: | MEF | ||
| Collectors: | P. Wilf, N.R. Cuneo, K.R. Johnson, P. Puerta, M. A. Gandolfo | Collection dates: | 1999, 2002, 2004 |
Metadata
| Also known as: | LH3 | ||
| Database number: | 133044 | ||
| Authorizer: | P. Wilf | Enterer: | M. Donovan, E. Stiles |
| Modifier: | E. Stiles | Research group: | paleobotany |
| Created: | 2012-09-01 01:46:37 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2012-09-01 01:46:37 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 42725. | P. Wilf, K. R. Johnson, N. R. Cúneo, M. E. Smith, B. S. Singer and M. A. Gandolfo. 2005. Eocene Plant Diversity at Laguna del Hunco and Río Pichileufú, Patagonia, Argentina. The American Naturalist 165(6):634-650 [P. Wilf/M. Donovan] |
Secondary references:
| 43002 | E. J. Hermsen, M. A. Gandolfo, and M. C. Zamaloa. 2012. The fossil record of Eucalyptus in Patagonia. American Journal of Botany 99:1356-1374 [P. Wilf/M. Donovan] |