List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Coniferales
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Cupressinoxylon hallei wood
Krausel 1924
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14 specimens | ||||||
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Coniferales
- Podocarpaceae
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Phyllocladoxylon antarcticum wood
Gothan 1905
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45 specimens | ||||||
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Coniferales
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Protophyllocladoxylon francisiae wood
Pujana et al. 2014
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3 specimens | ||||||
| see common names | |||||||
Geography
| Country: | Antarctica |
| Coordinates: | 64.2° South, 56.7° West (view map) |
| Paleocoordinates: | 63.4° South, 62.9° West |
| Basis of coordinate: | estimated from map |
Stratigraphy
| Formation: | La Meseta | Member: | Cucullaea II | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: Most recent studies (Montes et al., 2010), although still in progress, indicate that the lower and middle parts of the La Meseta Formation (Valle de las Focas, Acantilados, Campamento, Cucullaea I and the lower part of Cucullaea II allomembers) were deposited during the early Eocene and sedimentation may have begun as early as late Paleocene. | |||||
Lithology and environment
| Primary lithology: | mudstone |
| Secondary lithology: | siltstone |
| Environment: | deltaic indet. |
| Geology comments: The La Meseta Formation (Elliot and Trauman, 1982) represents an Eocene incised valley fill (estuarine system) developed in the northern part of the James Ross Basin, at the NE of the Antarctic Peninsula. Marenssi et al. (1998) divided the formation into six allomembers and described shallow marine and deltaic palaeonvironments. | |
Taphonomy
| Modes of preservation: | concretion,permineralized |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Collection size: | 82 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Museum repositories: | MACN | Collection dates: | February 2005 |
| Collection method comments: The material studied herein is a collection of 82 conifer woods, out of 120 wood samples (the other 38 samples are angiosperms). They are housed at the Palaeobotanical Collection of the Museo Argentino de Ciencias Naturales, under accession numbers BA Pb 1400 to 14519 (Appendix A). | |
Metadata
| Database number: | 168818 | ||
| Authorizer: | C. Jaramillo | Enterer: | C. Jaramillo |
| Modifier: | G. Varnham | Research group: | paleobotany |
| Created: | 2015-04-30 01:45:46 | Last modified: | 2022-04-06 07:07:32 |
| Access level: | the public | Released: | 2015-04-30 01:45:46 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 54957. | fossil record | R. R. Pujana, S. N. Santillana, and S. A. Marenssi. 2014. Conifer fossil woods from the La Meseta Formation (Eocene of Western Antarctica): Evidence of Podocarpaceae-dominated forests. Review of Palaeobotany and Palynology (200)122-137 [C. Jaramillo/C. Jaramillo] |