中国晚始新世—早渐新世地层孢粉组合及其古气候特征

王晓梅; 王明镇; 张锡麒

Volume 30 Issue 3

May 2005

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WANG Xiao-mei, WANG Ming-zhen, ZHANG Xi-qi, 2005. Palynology Assemblages and Paleoclimatic Character of the Late Eocene to the Early Oligocene in China. Earth Science, 30(3): 309-316.

Citation:

WANG Xiao-mei, WANG Ming-zhen, ZHANG Xi-qi, 2005. Palynology Assemblages and Paleoclimatic Character of the Late Eocene to the Early Oligocene in China. Earth Science, 30(3): 309-316.

WANG Xiao-mei, WANG Ming-zhen, ZHANG Xi-qi, 2005. Palynology Assemblages and Paleoclimatic Character of the Late Eocene to the Early Oligocene in China. Earth Science, 30(3): 309-316.

Citation:

WANG Xiao-mei, WANG Ming-zhen, ZHANG Xi-qi, 2005. Palynology Assemblages and Paleoclimatic Character of the Late Eocene to the Early Oligocene in China. Earth Science, 30(3): 309-316.

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Palynology Assemblages and Paleoclimatic Character of the Late Eocene to the Early Oligocene in China

1.
Key Laboratory of Marine Geology, Ministry of Education, Tongji University, Shanghai 200092, China
2.
Shandong University of Science and Technology, Tai'an 271019, China

Received Date: 2004-05-23
Publish Date: 2005-05-25

Abstract

Abstract

The transition from the Eocene to the Oligocene is the most significant interval in Earth history since the dinosaurs died out around 65 Ma. During this interval the earth's climate changed from a "greenhouse" to an "icehouse". Global temperature plummeted and the first Antarctic icecap appeared. These climatic stresses triggered plant and animal extinction. The palynology in China also reflects these trends. Based on a study of the development of palynology and the flora from the Late Eocene to Early Oligocene in China, it is suggested that the diversity and abundance of tropical and subtropical plants significantly decreased, and temperate plants such as Betulaeae and Ulmaceae increased. Montane conifers also greatly increased, and at the same time the abundance of arid plants and herbaceous plants rose. The palynological assemblages from the Late Eocene to Early Oligocene reflect the floral changes that occurred, from coniferous and broad-leaved forest dominated by tropical and subtropical evergreen plants to coniferous and broad-leaved forest dominated by deciduous plants. The paleoclimate conditions in the Late Eocene to Early Oligocene changed from warm and wet to drier and cooler. This trend coincides with world climate at that time, which means that the Chinese mainland was influenced by the global transition and the development of the continental icecap over Antarctica.
- Eocene,
- Oligocene,
- palynological assemblage,
- paleoclimate,
- China

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References(54)

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Palynology Assemblages and Paleoclimatic Character of the Late Eocene to the Early Oligocene in China

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