贵县位于复式向斜,核部为中石炭统地层、两翼为寒武-志留系泥盆系地层,地层产状平缓,倾角10°—20°,向斜轴向约为N85°E。在地貌上形成一向东西敞开的盆地,郁江从盆地中部由西向东流过。调查区位于向斜北翼的岩溶平原区,基岩为泥盆系上统和石炭系下统的石灰岩及白云质灰岩。第四纪松软土为以红色为主的粘土,表层夹有大量的铁质结核,底部夹 Guixian County is located in the compound syncline, the core of the Carboniferous strata, the two wings of the Cambrian - Silurian Devonian strata, formation smooth, dip 10 ° -20 °, the syncline axis is about N85 ° E. On the topography of a basin that has been open to the West, the Yu River flows from west to east from the central basin. The survey area is located in the karst plain area of ​​the northward syncline and the bedrock is limestone and dolomitic limestone under Devonian and Carboniferous. Quaternary pine soft soil is mainly red clay, the surface of a large number of iron nodules, the bottom folder