Silurian system

常见例句

This paper makes an approach to form, occurrence, origin of rootless folds in the Maoxian Group of the Silurian System and their relationship with large folds.
本文初步探讨了四川汶川─理县志留系茂县群中广泛发育的无根钩状褶皱的形态、产状、成因和与大型褶皱构造的关系。
The geological and geochemical study results indicate that the metallogenetic materials came from the hydromica mudstones and shales of the Hanjiadian Group of Lower Silurian System.
地质和地球化学研究结果认为，铝土矿的成矿物质来源于下志留统韩家店群的水云母泥、页岩。
The strata from Sinian to Silurian system are new formations and fields with better exploration potential in southeast area in Sichuan province, but the degree of prospecting is quite low.
震旦系—志留系是川东南地区油气勘探的新层系、新领域，具有较好的勘探前景，但勘探程度极低。