挪威北部现处于极地地带，但岩溶，尤其洞穴却很发育。现已查明的洞穴达１１００多个，最长的达１１ｋｍ，最深的有６３０ｍ。地表微岩溶形态也丰富。根据野外调查和初步分析，其岩溶发育机制可概括如下：（１）特殊的地质背景：条带状大理岩（相对透水）间夹于片岩（相对隔水）中，这导致了大量的外源水的补给；第三纪以来的强烈抬升导致岩石的变质，以及断裂和一些构造脆弱面的形成；第四纪冰川作用和深切峡湾的形成导致了非常大的水力梯度和水动力场；（２）有利的气候条件，包括非常大的降水量（平均年降水量在３０００～３５００ｍｍ之间），以及冰期间冰期的相互作用（导致周期性的强烈水循环）。特殊的地质背景和有利的条件为岩溶形成提供了有利的水文和水文地质条件，因此水的强烈侵蚀作用很可能是该地区岩溶形成的主要机制 Northern Norway is now in the polar region, but karst, especially the cave is very developed. It has been identified more than 1100 caves, the longest up to 11km, the deepest 630m. Surface karstification is also abundant. According to the field investigation and preliminary analysis, the karst development mechanism can be summarized as follows: (1) Special geological background: the stratified marble (relatively water permeable) is sandwiched between schists (relatively water-barrier), which leads to a large amount of exogenous The recharge of water; the intense uplift since the Tertiary led to the metamorphism of rocks and the formation of fractures and some structurally weaker surfaces; the formation of Quaternary glaciations and deep fjords resulted in very large hydraulic gradients and hydrodynamic fields; 2) Favorable climatic conditions, including very large amounts of precipitation (average annual precipitation between 3000 and 3500 mm) and glacial interglacials during the ice period (resulting in a cyclical intense water cycle). The special geological background and favorable conditions provide favorable hydrological and hydrogeological conditions for the formation of karst, so the intense erosion of water is likely to be the main mechanism of karst formation in this area