摩洛哥前阿特拉斯山脉前寒武系-寒武系界线的地层概述

作者首先评述了前阿特拉斯山脉（摩洛哥）古生代山系前寒武纪盖层的三个部分:火山质和磨拉石质前寒武纪Ⅲ岩系、白云质阿土图期（Adoudounian）岩系和塔利文期（Taliwinnian）岩系（“酒红色（lie de vin）”岩系）,塔利文期岩系主要是陆相的,但西部则发育成海相含叠层石地层,据此有可能确定由塔利文阶到下寒武统的过渡。随后的几个章节介绍了下寒武统的发现和研究简史,以及对前阿特拉斯山脉西部下寒武统含三叶虫“阶”的概述。文章还附有若干幅阿土图期、塔列文期和早寒武世的古地理图,以及一些地层和构造剖面图。

STRATIGRAPHIC NOTE CONCERING THE PRECAMBRIAN-CAMBRIAN BOUNDARY IN THE ANTI-ATLAS,MOROCCO

The authors first review the three parts of the Precambrian cover of the Proterozoic chains of the Anti-Atlas（Morocco）: the volcanic and molassic Precambrian III,the dolomitic Adoudounian an the Taliwinia （"lie de vin"series）which is mainly continental but develops into marine stromatolitecontaining formations in the west,enabling the transition from the Taliwinian to the Lower Cambrian to be defined. The paragraphs,that follow give a brief history of the discovery and study of the Lower Cambrian and an outline of the trilobite"stages"of the Lower Cambrian of the western Anti-Atlas. The note is accompanied by a number of paleogeographical maps of the Adoudounian,the Taliwinian and the Lower Cambrian,and a unmber of stratgraphic and structural sections.