摘要
本文主要论述了弓笔石在海洋中的活动方向及范围,并指出幼枝的摆动倾向和古海流有关。利用幼枝和主枝夹角的平均值测绘中志留世时期古海流的方向,对寻找矿产的分布具有实际意义。
In the paper, the moving directions and scopes of cyrtograptus in sea are discussed, and it is pointed out that the sway tendency of cyrtograptus'young branches is related to the direction of paleosea current. Using the average values of the angles between the young and primary branches, to determine the paleosea current direction in the Middle Silurian Period is of actual significance in the exploration of mineral resource distribution.
出处
《西安矿业学院学报》
北大核心
1989年第3期30-31,共2页
Journal of Xi'an University of Science & Technology
关键词
弓笔石聚群
古海流
方向
志留纪
Cyrtograptus association
principle of machinery stable seat
autochthonous burying
Paleosea current
Middle Silurian Period
