中国地质调查局: 摩洛哥El Menizla幅1∶50000地质图数据库(法语版)

摩洛哥1∶50 000El Menizla幅是“中华人民共和国援摩洛哥西阿特拉斯山地区地球化学和地质填图第一期技术合作项目”的四幅1∶50 000图幅（El Menizla、Jbel Toubkal、Talwat、Had Zrqtane）之一。图幅出露自古生代以来多数地史时期的地层，寒武系主体岩性为一套灰绿色中薄层状砂岩、泥质粉砂岩层，具似复理石构造特征；奥陶系也为一套海相碎屑沉积，由一套灰白色中厚层状石英砂岩和黑色中薄层状细砂岩、粉砂岩夹泥岩组成；志留系仅图幅中偏北部少量出露，为一套黑色泥页岩；泥盆系出露也不完整，零星出露于图幅中部地区，主要为一套灰岩；石炭系在图幅中南部大面积出露，主要为一套由中薄层状砂岩、泥岩组成的复理石建造，夹少量薄层状灰岩；二叠系和三叠系为一套红色砾岩、砂岩和粘土岩组成的陆相沉积；侏罗系为一套由碳酸盐岩和红色粘土岩组成的海陆过渡相沉积。图幅内还产出大量的古生物化石，在奥陶系内采获了少量三叶虫、壳类化石；泥盆系内也大量产出腕足、双壳等化石；石炭系内采获的植物化石鉴定为大羽羊齿；三叠系内发育虫迹，并见有少量植物化石；侏罗系内化石最为丰富，以腕足、双壳为主，并见有珊瑚化石。

The 1:50,000 El Menizla geological sheet in Morocco is one of the four 1:50,000 map sheets (El Menizla, Jbel Toubkal, Talwat, Had Zrqtane) developed under the "First Phase Technical Cooperation Project of Geochemical and Geological Mapping in the Western Atlas Mountains, Morocco, assisted by the People's Republic of China". The sheet outcrops strata from most geological epochs since the Paleozoic Era. The main lithology of the Cambrian system consists of a suite of grayish-green medium-thin bedded sandstones and muddy siltstones, exhibiting flysch-like structural features. The Ordovician system is another suite of marine clastic deposits, comprising grayish-white medium-thick bedded quartz sandstones, black medium-thin bedded fine sandstones and siltstones intercalated with mudstones. The Silurian system is only exposed in a small tract in the northern part of the sheet, composed of black mudstones and shales. The Devonian system is also incompletely outcropped, sporadically occurring in the central region of the sheet, and is mainly represented by limestones. The Carboniferous system is extensively exposed in the south-central part of the sheet, primarily forming a flysch formation composed of medium-thin bedded sandstones and mudstones, with a small amount of thin-bedded limestones intercalated. The Permian and Triassic systems are continental sedimentary deposits consisting of red conglomerates, sandstones and claystones. The Jurassic system constitutes a paralic sedimentary suite composed of carbonates and red claystones. A substantial quantity of paleontological fossils have been discovered within the sheet. A small number of trilobites and shell fossils were collected from the Ordovician system; a large number of brachiopods, bivalves and other fossils are present in the Devonian system; plant fossils collected from the Carboniferous system were identified as *Gigantopteris*; trace fossils are developed in the Triassic system, with a small amount of plant fossils also observed; the Jurassic system yields the most abundant fossils, dominated by brachiopods and bivalves, with coral fossils also present.