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采用浸渍方法在中国北部燕山地区青白口系中发现大量疑源类,共计47属148种。疑源类的大量繁衍代表当时古地理环境为海域广阔、盐度正常的浅水海相沉积。青白口系(800—900Ma)疑源类主要特征:以单球藻类的大量繁衍并伴有多球藻类的分子;在线形藻类中有带状和管状的藻类,以宽度大、数量多为主要特征。其次由多个球形细胞组成的藻丝体;有少量船形藻类的分子出现;800—900Ma之间微生物群主要由下列类型组成:Mi-crococentrica,Satka,Symplasosphaeridium,Synsphaeridium,Chuaria,Statimophada,Tasmanites,Siphono-phycus,Taeniatum等属的分子。以上疑源类的稳定性和可比性,可作为具有广泛生物地层对比依据。
A large number of suspected sources have been found in the Qingbaikou Estuary in the Yanshan area of northern China using a total of 148 species of 47 genera. A large number of suspected source class representatives of the ancient geo-environment for the vast sea, salinity normal shallow marine sediments. Qingbaikou Department (800-900Ma) Main source of doubtful source: Monolococcus is multiply and concomitant with many globular algae molecules; banded algae and algae in banded algae are large in width and large in number feature. Followed by a number of spherical cells composed of algal filaments; a small number of ship-shaped algae molecules appear; 800-900Ma microbial flora mainly consists of the following types: Mi-crococentrica, Satka, Symplasosphaeridium, Synsphaeridium, Chuaria, Statimophada, Tasmanites, Siphono -phycus, Taeniatum and other genera. The stability and comparability of these suspected sources can be used as a basis for a wide range of biological stratigraphy.