The rocks of the Critical Zone can be grouped into two petrologic series. 关键带的岩石可以分为两个岩组。
This paper sums up present research situation and advances in oil from coals in organic petrologic point of view. 并从有机岩石学观点出发，对煤成油的研究现状和进展进行了评述。
The coal petrologic automatic analysis is realized mainly by means of random reflectance of vitrinite. 煤岩自动分析主要采用镜质组随机反射率自动测试技术来实现。
According to the petrologic characteristics of core at 7 - 25 - 34 well, 9 types of lithofacies (Fsm, Fm, Fl, Sr, Sp, Sh, Sl, St, Ss) are identified. 重点分析了该区7-25-34取心井段的岩石学特征,识别出Fsm,Fm,Fl,Sr,Sp,Sh,Sl,St和Ss共9种类型岩相。
A detailed petrologic and mineralogic study and a forming condition calculation have been carried out on the two types of enclaves. 对这两类岩石包体进行了详细的岩石学和矿物学研究，并计算了各类岩石包体的形成条件。
In this paper, the petrologic characteristics of the lacustrine limestones are studied in detail on the basis of core observation and outcrop. 本文在实测地表剖面和详细观察岩心的基础上，仔细研究了此套灰岩的岩石学特徵。
