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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个黄绿地图衣最大内切圆直径,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。
According to the maximum inscribed circle diameter of the 96 yellow-green map clothing measured in the ancient bridges, pallets, archways, tombstones, ancient houses, ancient houses and cave cave openings in Huashan Grottoes, the main mining age of Huashan Grottoes was determined to be 515 ~ 370 years ago, that is, the late Ming Dynasty (AD 1477 ~ 1632 AD), the comparison between the lithology of the Grottoes and the lithology of the ancient buildings in the surrounding areas, as well as the historical records and the ancient porcelain fragments left in the grottoes can prove this. In view of the work of measuring the underground caves in the grottoes, it is inferred that the mining depth in the depths of the grottoes may extend to the Qing Dynasty.