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在过去较长时间里,国内中比例尺的地质编图,基本上是按年代地层单位进行的,即编制所谓系图。这方面的编图方法是成熟的,已取得了比较丰富的经验。贵州省1964年编了1:50万地质图;1981年又重新编制了同比例尺的贵州省地质图。由于全省1:20万区调工作完成,后者的地质研究程度有明显提高,图件的内容和表现形式也有所前进。但成图单元依然是岩石地层单位与年代地层单位相混淆的产物,基本上是在统一地层划分概念为指导的系图。在编制《贵州省区域地质志》主要附图之一的1:50万贵州省地质图时,我们已感到系图不能很好地反映沉积岩发育、地层齐全地区的岩层或岩相的变化特点。随着现代地
For a long time in the past, the geological scale-mapping in the country was basically carried out according to the strata age units, that is, the so-called departmental plan was drafted. The compilation method in this area is mature and has gained rich experience. Guizhou Province in 1964 compiled a 1: 500000 geological map; in 1981 and re-compiled the same scale geological map of Guizhou Province. As the province 1: 200000 regional adjustment work is completed, the latter’s degree of geological research has improved significantly, the content of the map and manifestations have also advanced. However, the mapping unit is still the product of the confusion between the unit of lithostratigraphy and the unit of the strata in the age, and is basically the lineage guided by the concept of unified stratigraphic division. In the compilation of the 1: 500,000 geological map of Guizhou Province, one of the main drawings of “Geological Records of Regional Geology in Guizhou Province”, we have felt that the diagrams do not reflect well the characteristics of the rock strata or lithofacies of the sedimentary rock development and the complete strata. With modernity