【摘要】 <正>本文根据在海南岛福山福一井,井深2,903.58—3,024.39米(即流沙港组)中找到丰富的孢子花粉及一定数量的藻类进行研究。讨论了该段地层的地质时代属晚始新世—早渐新世,并对其植物群及古气候、古环境进行初步探讨。初步研究鉴定的孢粉有50科,130属,200多个孢粉类型,其中2个新种。藻类约有9属,十几个类型。更多还原

【Abstract】 A great number of pollen and spores were found from the Liushagang formation,Bore Hole Fu-1,Hainan Island.About 200 palynomorphs of 130 genera of 50 families were identified.The main elements in this group are Quer-coidites,Cupuliferoipollenites, Liquidambarpollenites, Caryapollenites, Jugiands pollenites, Ulmipollenites, Alnipollenites, Betulaceoipollenites, Platycaryapol-lenites,Ostryoipollenites, Persicarioipollis, Salixipollenites,Typha,Lemna,Po-tamogeton,Myrtaceidites, Gothanipollis, Florschuetzia, Taxodiaceaepollenites, Pinuspollenites,Polypodiaceoiporites,Crassoretitriletes,etc. Among them two new species, Persicarioipollis crassireticulates, P. hainanensis, are described. Some algae were found in this formation, they belong to Acritarchs and Chlorophta,such as Granodiscus,Leiosphaeridia,Dictyotidium,Pediastrum.The palynological assemblage of Liushagang formation has been discussed, and compared with the palynological data of some provinces of South China. The geological age of the assemblage of Liushagang formation is assigned to Late Eocene-Early Oligocene. The flora of that time was a mixed forest consisting of deciduous and evergreen broad-leaved trees and conifer,and theclimate of the studied area belonged to warm and humid subtropical type.The temperature was lower than that at present.Having the indications of wide water areas, this section consisted mainly of the deposits of subaerial fresh-water lacustrine facies, while the layers including Florshuetzia trilobata and cf.Zonocosites had possibly undergone the transgression of sea water.更多还原