TERRESTRIAL AND MARINE RECORDS OF CLIMATIC AND ENVIRONMENTAL-CHANGES DURING THE PLIOCENE IN SUBTROPICAL FLORIDA

被引:0
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作者
WILLARD, DA
CRONIN, TM
ISHMAN, SE
LITWIN, RJ
机构
关键词
D O I
10.1130/0091-7613(1993)021<0679:TAMROC>2.3.CO;2
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Pollen, ostracode, and benthic foraminifer assemblages deposited during sea-level high-stands in subtropical Florida record a climate change during the period 4.5-1.0 Ma. Before 3.5 Ma, open-shelf marine faunas and pollen assemblages with abundant Pinus, Quercus, Fagus, Carya, and nonarboreal pollen were present, indicating cooler conditions than today. From approximately 3.5 to 1.0 Ma, marine and terrestrial records indicate warmer conditions, similar to those existing in south Florida today. Combined with evidence for much warmer than modern conditions at high latitudes, these data suggest that increased poleward oceanic heat transport, possibly related to the emergence of the Central American isthmus between approximately 3.5 and 2.5 Ma, was a major influence on mid-Pliocene warmth.
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页码:679 / 682
页数:4
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