| Abstract: | Tropical South America has the highest plant diversity of any region today, but this richness is usually characterized as a geologically recent development (Neogene or Pleistocene). From caldera-lake beds exposed at Laguna del Hunco in Patagonia, Argentina, paleolatitude ???47??S, we report 102 leaf species. Radioisotopic and paleomagnetic analyses indicate that the flora was deposited 52 million years ago, the time of the early Eocene climatic optimum, when tropical plant taxa and warm, equable climates reached middle latitudes of both hemispheres. Adjusted for sample size, observed richness exceeds that of any other Eocene leaf flora, supporting an ancient history of high plant diversity in warm areas of South America. |
| Genre: | Article |
| ProdID: | 70025643 |
| Citation Author: | Wilf, P.; Cuneo, N. R.; Johnson, K. R.; Hicks, J. F.; Wing, S. L.; Obradovich, J. D. |
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| Citation End Page: | 125 |
| Citation Issue: | 5616 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | High plant diversity in Eocene South America: Evidence from Patagonia; 2003; Article; Journal; Science; Wilf, P.; Cuneo, N. R.; Johnson, K. R.; Hicks, J. F.; Wing, S. L.; Obradovich, J. D. |
| Citation Start Page: | 122 |
| Citation Volume: | 300 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | High plant diversity in Eocene South America: Evidence from Patagonia; 2003; Article; Journal; Science; Wilf, P.; Cuneo, N. R.; Johnson, K. R.; Hicks, J. F.; Wing, S. L.; Obradovich, J. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1126/science.1080475 |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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