皖南花山石窟群开凿年代地衣测年及成因

据在花山石窟地区古代桥梁、桥垛、牌坊、墓碑、古民居、古房基和石窟洞壁洞口量测出的96个黄绿地图衣最人内切圆直径，测定出花山石窟主要开采年代为距今515～370年即明代中晚期(公元1477～1632年间)，石窟岩性与周边地区古建筑岩性的比较以及史料记载和石窟中遗留的古代瓷器残片年代均能证明这一点。鉴于石窟地衣量测工作主要在石窟洞口进行，由此推测石窟深处开采时代可能延续至清代。

Lichenometric Dating, Excavated Age and Cause on Huashan Grottoes

According to 96 data of the maximum inscribed circle diameter of Rhizocarpon geographicum lichen on the ancient bridges and buttress, toriis, tombstones, folk house, foundations and the wall of grottoes entrances in the Huashan Grottoes area, the carving time of the grottoes is likely 515-370 aBP, that is, in the middle and late Ming Dynasty (1477-1632 AD). The lithological comparisons of the grottoes and the surrounding around ancient architectures, historical materials record, and the ages of ancient China relics in the grottoes are researched. All of the above evidences can prove the lichenometric dating result. The lichenometric dating was measured on the grottoes entrances (inner grottoes has no sunlight, so the lichen can not grow), therefore, it can be inferred that the excavation to the inner grottoes can be possibly dated back to the Qing Dynasty.