| Abstract: | During the Paleocene and Eocene, climates were characterized by a low mean annual range of temperature (a maximum of 10-15??C), a moderate to high mean annual temperature (10-20??C), and abundant precipitation; strong broad-leaved evergreen vegetation extended to almost lat. 60??N during the Paleocene and to well above 61??N during the Eocene. Poleward of the broad-leaved evergreen forests were forests that were broad-leaved deciduous; these deciduous forests, however, were unlike extant broad-leaved deciduous forests in general floristic composition and physiognomy. Coniferous forests probably occupied the northernmost latitudes. At the end of the Eocene, a major climatic deterioration resulted in a high (> 30??C) mean annual range of temperature and a low mean annual temperature (< 10??C). Vegetation represented temperate broad-leaved deciduous and coniferous forests. The Oligocene and Neogene climatic trends represent a decrease in both mean annual range of temperature and mean annual temperature. Tundra vegetation did not appear until late in the Neogene. The present distribution of broad-leaved evergreens concomitant with the principles of plant physiology indicates that present winter light conditions at high latitudes could not support broad-leaved evergreen forest. A possible solution to the problem is to increase winter light by lessening the inclination of the earth‘s rotational axis. ?? 1980. |
| Genre: | Article |
| ProdID: | 70012190 |
| Citation Author: | Wolfe, J. A. |
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| Citation End Page: | 323 |
| Citation Issue: | C |
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| Citation Language: | English |
| Citation Larger Work Title: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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| Citation Number Of Pages: | 11 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Tertiary climates and floristic relationships at high latitudes in the northern hemisphere; 1980; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Wolfe, J. A. |
| Citation Start Page: | 313 |
| Citation Volume: | 30 |
| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | Tertiary climates and floristic relationships at high latitudes in the northern hemisphere; 1980; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Wolfe, J. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0031-0182(80)90063-2 |
| Date Other: | Tue, 1 Jan 1980 00:00 -0600 |
| Publisher: | Elsevier |
