《徐霞客游记·滇游日记十》
山崖中间镶嵌有两层青绿色的石头，像围着两条彩带，每层的厚度有一丈多高，所以石匠顺着采凿从而形成洞穴。
其崖间中嵌青绿色者两层，如带围，各高丈余，故凿者依而穴之。
In the middle of the mountain cliff, there are two layers of greenish-blue stones that are embedded like two ribbons, each layer is more than one zhang thick, so the stonemasons can form caves by quarrying along them.