Karst - polygons

Coastal landscape underlain by limestone which has been eroded by dissolution, producing ridges, towers, fissures, sinkholes and other characteristic landforms. Where known the type of karst e.g. limestone, dolomite, evaporitic rocks, sinkholes, boulder piles etc. is stated. Chronological information is presented as calendar age BP. Confidence is defined as follows: 1. High: Sampled feature with good age and palaeoenvironmental control. 2. Sampled feature with poor or none age and palaeoenvironmental control. 3. Constructed by remote sensing data only. 4. Low: Reasonable without any direct evidence.基底为石灰岩的海岸景观经溶蚀作用改造，形成脊岭、塔状地貌、裂隙、落水洞及其他典型地貌。若已知喀斯特（karst）的类型（如石灰岩、白云岩、蒸发岩、落水洞、漂砾堆等），则会予以标注。年代学信息以日历年龄BP（Before Present）形式呈现。可信度等级定义如下：1. 高：采样对象具备良好的年代与古环境控制依据；2. 采样对象的年代与古环境控制依据不足或无相关依据；3. 仅基于遥感数据构建；4. 低：推测合理但无任何直接证据支撑。