由于地表水沿成岩孔隙、构造节理扩大溶蚀形成。它可以分散成单个出现,也可以由许多溶孔组合成蜂巢状。该处溶孔为单个出现，溶孔不断被侵蚀由小变大，最终形成溶洞。A dissolution pore is formed by surface water eroding along and eapanding a diagenetic hole or a tectonic joint. Dissolution pores may appear individually, or many dissolution pores appear together forming a honeycomb structure. This single dissolution is eroded continuously and becomes bigger and bigger and may finally become a cave.