浙江澉山土壤孢粉和微体古生物研究——兼论古地理环境的演变

Study of Soil Palynology and Micropaleontology as Related to the Palaeogeographical Environmental Evolution in Kanshan Region of Zhejiang Province.

作者对浙江澉山地区8个水田样点采集的60cm深处的9个土壤样品进行了土壤孢粉和微体古生物的测定,见有四类孢粉组合,即:①藜—青刚栎—麻栎—松;②藜—青刚栎—麻栎—禾本科;③水簌—青刚栎—麻栎;④麻栎—青刚栎—眼子莱及眼子莱—青刚栎—黑三棱。在几个土样中,还见到微体古生物毕克卷转虫变种化石。说明7000多年以来,澈山一带曾经历了海湾→泻湖→淡水湖泊。

Soil palynology and micropaleontology in low land paddy fields at 8 sites near Kanshan had been studied by the determinations of the spore-pollen and micropaleontological fossils. Four combinations of spore-pollen were found in 9 soil samples collected at a depth of 60 cm beneath the fields respectively. These combinations were as follows: 1 ) Chenopodiaceae-Quercus glauca-Quercus acutissima-Pinus; 2 ) Chenopodiaceae-Quercus glauca-Quercus acutissima-Graminceae; 3 ) Cerato-pteris-Quercus glauco-Quercus acutissima; 4 ) Quercus acutissima-Quercus glauca-Potamogeto-naceae and Potamogetonaceae-Quercus glauca-Sparganium. In some soil samples, a variety of Ammonia beccarii var. was found to be predoninant in the micropaleontological fossils. It is, therefore, suggested that the Kanshan region had undergone a palaeographical environmental evolution of the bay-lagoon-fresh-waterlakes and marshes-plain, ever since 7000 years ago.