广西百色盆地早更新世长蛇岭组植物群的古气候分析

利用最相似现生种类分析法和叶相特征分析法,对产自广西百色盆地早更新世长蛇岭组植物群进行古气候分析.结果表明这个植物群反映的古气候性质是亚热带—热带过渡带,年均温约24℃,年较差约3℃-5℃.

A PALAEOCLIMATIC ANALYSIS ON EARLY PLEISTOCENE FLORA OF CHANGSHELING FORMATION, BAISE BASIN, GUANGXI

Palaeoclimatology is the study of climatic regimes in geological times. Historically twenty-three sources of proxy data, including glaciological, geological, biological and historical, have been used in reconstructing Quaternary Palaeoclimatology (Bradley, 1985). The present paper only applies biological evidence, that is fossil angiospermous leaves from the Changsheling Formation, Baise Basin, Guangxi. Palaeoclimate by inference from fossil plants has been used for a long time. Adophe Brongniart (1828-1837) suggested that the natural environmental requirements of fossil forms could be inferred from the requirements of nearly related extant forms and pointed out that plants should be more reliable as indicators of the past conditions than animals. Since the fifties of the century, attempts have been made by palaeobotanists to improve the methods of palaeoclimatic study. Axelrod and Bailey (1969) and Wolfe (1971, 1979), for example, developed quantitative methods to reckon some paleoclimatic parameters.