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宁化县湖村,位于武夷山脉中段东麓,永梅(永安—梅县)拗陷带的西缘,这里在二亿多年前是一个海湾地区,沉积了厚达200多米的上石炭统船山灰岩与下二叠统栖霞白云质灰岩等地层,沿拗陷带边缘呈北东—南西向展布,与构造线方向一致。灰岩地层倾角平缓。2°—3°,倾向北西(280°—350°)。北东—南西向断裂切割各时代地层,使古老变质岩层(震旦纪)与上古生代地层直接接触。北西—南东向(300°—120°)小断裂发育,地下水长期沿此断裂带溶蚀,形成长条状溶洞,自南西向北东方向雁行排列。在北西、北东两组断裂交叉部
Lake County, Ninghua County, is located in the eastern foot of the middle of the Wuyishan Mountains, Yongmei (Yongan - Meixian) depression with the western margin of here more than 200 million years ago is a Gulf region, deposition of more than 200 meters thick on the Carbon Boat ash The rocks and the Lower Permian Qixia dolomitic limestone and other strata show a northeast-southwesterly distribution along the margin of the depression zone, which is consistent with the direction of the tectonic line. Limestone stratum gently. 2 ° -3 ° and northwest (280 ° -350 °). North-East-South-West fault cut the strata of all ages, so that the ancient metamorphic rock (Sinian) and the Upper Paleozoic strata in direct contact. Northwest-South (300 ° -120 °) small faults develop, and groundwater has been dissolved along the fault zone for a long time to form long-shaped caves, which are arranged in an order from southwest to north east. In the northwest, north-east two sets of fault intersection