摘要
广东连县水足塘下石炭统六个层位发育丰富的遗迹化石,遗迹大都保留于灰岩、泥灰岩中,共计有九个遗迹属及类型,它们是Zoophycos管状潜穴,Chondrites,Thalassinoides,Teichichnus?枝状潜穴,不规则状潜穴。Planolites和Ancorlchnus。其中刘家塘组下部发现管状潜穴;中上部发现Zoophycos、Thalassinoides、不规则状潜穴Chondrites、Teichichnus?及枝状潜穴,它们形成一遗迹组合;石蹬子组发现Chondrites及Ancourichnus;梓门桥组发现Zoophycos及Planolites.此组合形成于开阔台地相,成员形成于不同时的底质,分属Zoophycos和Glossifungites两个遗迹相。
Trace fossils are abundant and well-preserved in the lower Carboniferous section of Sbuizutang, Lian County, Guangdong. Most of them occur in limestone and mudstone. Nine ichnogenus and ichnotype are found, they are: Zoophycos, tube-liked burrow,Chondrites, Thalassinoides, Teichichnus?, Branching burrow, irregular burrow, Planolites and Ancorichnus. We have described each trace, discussed its classify and analysed its ecological significance in this paper. Those trace fossils are excellent indicator of environment. Presence of trace alone such as Chondrites in Shidengzi Formation and Zoophycos & Planolites in Zimenqiao Formation present low oxygen, deeper channel or basin of platform. Backfill structure Ancorichnus in the top part of Shidengzi Formation, and tube-liked burrow in Liujiatang Formation are interpreted to have formed in lagoon, with low energy.
A trace assemblage predominted by Zoophycos, Chondrites and Thalassinoides is recognized in middle part of Liujiatang Formation. The cross-cutting relationships and preservational style show the presence of a strict tierring of the respectiveburrows. Zoophycos, Thalassinoides and irregular burrow formed in soft ground belong to Zoophycos ichnofacies. Chondrites, Teichichnus?and branching burrow formed in firm ground belong to Glossifilngites ichnofacies. This Zoophycos-Thalossinoides-Chondrites assemblage is typical trace assemblage of open platform.
出处
《资源调查与环境》
1989年第2期103-116,共14页
Resources Survey & Environment
关键词
遗迹化石
灰岩
石炭系
广东连县
trace fossil
limestone, ecological environment, Carboniferous system, Lian County, Guangdong.
