Laguna del Hunco: quarry LH19: 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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unclassified
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Ginkgoites patagonicus
Villar de Seoane et al. 2015
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Villar de Seoane et al. 2015 | ||||||
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Magnoliopsida
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Magnoliopsida informal TY057 leaf
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1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | Argentina | State/province: | Chubut |
| Coordinates: | 42.5° South, 70.0° West (view map) | ||
| Paleocoordinates: | 45.0° South, 60.0° West | ||
| 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 - 47.8 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: | LH19 | ||
| Database number: | 133060 | ||
| Authorizer: | P. Wilf | Enterer: | M. Donovan, E. Stiles |
| Modifier: | E. Stiles | Research group: | paleobotany |
| Created: | 2012-09-01 01:52:02 | Last modified: | 2018-11-02 11:51:55 |
| Access level: | the public | Released: | 2012-09-01 01:52:02 |
| Creative Commons license: | CC BY | ||
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:
| 66453 | L. Villar de Seoane, N. R. Cuneo, I. E. Escapa, P. Wilf, and M. A. Gandolfo. 2015. Ginkgoites patagonicus (Berry) comb. nov. from the Eocene of Patagonia, last ginkgoalean record in South America. International Journal of Plant Sciences 176(4):346-363 [P. Wilf/E. Stiles/E. Stiles] |