
“之”字形峡谷景观:一正断层切穿三叠纪板状灰岩。在东-西拉张和“X”共轭斜向张性剪切作用下,岩层沿二个“X”共轭解理方向滑塌,形成锯齿状断层崖壁,并派生出来回转折的“之”字形峡谷。峡谷漫长而幽深,归属山地嶂谷型地貌。
“一线天”景观:因峡谷生成于张性断裂,从而严格受地质构造控制。两侧谷壁自下而上近于平行,呈波浪状“之”字形弯曲,直达谷顶,方见一线天空。
在谷中,游人行进时,总感觉面对悬崖峭壁阻挡,以为不可通行。然而,当抵达崖壁时,眼前却豁然开朗,宽阔游道突然呈45度角拐弯通向前方。峰回路转,妙趣横生,好似步入仙境,如诗如画。古人云:“山穷水尽疑无路,柳暗花明又一村”。
The ZigzagValley: The normal fault cut through slate from Triassic. When east-west tensional joint and “X” conjugate jointcaused the extensional shearing action, the layer would slump along two “X” conjugate joint, forming a tooth fault and then shaping a zigzag valley. This valley is deep and long, which belongs to a type of mountain narrow valley landforms.
The Sliver Lining: The valley was formed by tensional joints; thus it was defined by geological structure. Both sides of the valley walls are almost parallel from bottom to top, presenting a wavyzigzagbending to the top of valley and a silver lining came into being.