摘要
前人对高寨田组的划分对比和时代归属的方案较多,争议颇大。笔者通过对贵定地区的1∶5万区调,认为该区的高寨田组可划分为6个岩性段,其总体可与桐梓—合肥、印江—石阡两地区的岩石地层进行对比,从而使黔中—黔北的岩石地层单位统一起来。关于黔南志留系底部的一套砾岩层,前人一般认为属海滩沉积,并划分出不同的沉积类型,笔者根据砾石的分布和沉积特征,以及上覆地层的沉积关系,认为属陆相冲积扇体系更为恰当。
There is a debate on the division and correlation of Silurian Gaozhaitian Fm..Based on the 1:50000 regional geological survey, the author considers that Gaozhaitian Fm. can be subdivided into 6 Mbs and can be generally correlated with those in Tongzi_Zunyi and Yinjiang_Shiqian districts, making those in Central Guizhou to coincide with those in North Guizhou.Previous, the “basal conglomerate' was considered to be a beachrock, and could be subdivided into several sedimentary types. The author believes, however, that it belongs to continental alluvial fan based on the distribution of pebbles, the sedimentary feature and the contact relation with overlying stratum.
出处
《贵州地质》
1999年第2期130-135,共6页
Guizhou Geology
