在湖北丹江口丘陵区出露的基岩面上,发现一些擦痕(在均县习家店一带的丘陵上也有发现)。尤其是张家沟一带,这类擦痕更为多见。有人认为是冰川擦痕,有人怀疑是山洪时水中石子撞击而成,作者试提出另一种看法,即擦痕的形成实系一种泥流缓慢滑动所致。这里特作报道以供讨论。 A few scratches were found on the bedrock surface exposed in the hilly area of ​​Danjiangkou in Hubei (also found in the hills around Xijiandian in Juxian County). Especially Zhangjiagou area, such scratches more common. Some people think that the glacier scratches, some people suspected that when the flood was hit by water stones, the author tried to put forward another view that the formation of scratches is actually a slow slide due to mud flow. Here for special coverage for discussion.