According to observation and study, the paleokarstifications of Ordovician could be classified into 6 periods, i.e. depositional karstification, weathering curst karstification, burial karstification, semi-burial structural karstification, second burial k
According to observation and study, the paleokarstifications of Ordovician could be classified into 6 periods, i.e. depositional karstification, weathering curst karstification, burial karstification, semi-burial structural karstification, second burial k
研究表明，皖北奥陶系古岩溶可划分为沉积岩溶作用期、风化壳岩溶作用期、埋藏岩溶作用期、构造岩溶作用期和二次埋藏岩溶作用期；其岩溶类型主要有沉积岩溶、风化壳岩溶、埋藏岩溶或压释水岩溶和构造岩溶或热水岩溶四种类型；其岩溶岩包括岩溶沉积岩和岩溶改造岩两个大类，并可进一步划分出8个亚类和5个子亚类。