栗木地质勘探队自1957年以来,有部份机台在第四纪沖积层钻进.该层位于河床之上,因此在砾石内形成的大量的地下水位,涌水量很大,造成大量的流砂充填于砾石内.历年来,大量的砾石和采矿废石将河道全部堵塞掩盖.砾石的平均直径是在10～15公分左右,下部砾石大多是砂岩,上部是开采下来的废石(石灰岩),砾石废石各种形状都有,砂岩则很坚硬,一般6～7级, Chek Mu Geological Exploration Team Some of the machines have been drilling in Quaternary alluvial deposits since 1957. This bed is located above the river bed and therefore a large amount of groundwater level is formed in the gravel with a large amount of water inflow resulting in a large amount of Over the years, a large amount of gravel and mining waste stones have completely obstructed the river course.The gravel average diameter is about 10-15 cm, the lower gravel is mostly sandstone, and the upper part is the mining waste rock (limestone) , Gravel and waste all kinds of shapes, sandstone is very hard, generally 6 to 7,