moulage

The paleo-geomorphy before the sedimentary of the Permian formation is recovered with the Moulage method, then the karst geomorphy unit is partitioned.

采用法恢复出本区二叠系沉积前的古地貌，划分出岩溶地貌单元，古地貌恢复表明，研究区古地貌总体表现为起伏不大，西东低，相对差最大约130米。

Current paleoecological studies strongly rely on fossil relics such as footprint, moulage, reliquiae, bone and other materials, but these materials are difficult rarely available and to be preserved.

而含粪的沉积物在特定的区域则是常见的，特定的海鸟粪标型元素特征是对生物链、气候、冰盖进退、海平面升降等境因素的记录或响应。