张家界砂岩峰林景观成因机制

通过实地考察，室内遥感影像分析，得出如下结论：张家界石英砂岩峰林地貌岩层产状平缓，地壳水平上升，流水沿构造破裂面的节理侵蚀及重力崩塌作用造就了石英砂岩峰林地貌的基本形态。地貌形态的物质基础是特定的岩性。石英砂岩峰林地貌主要由方山、台地、峰墙、峰丛、峰林、石门、天生桥及峡谷、嶂谷等构成。其岩石胶结良好，刚性强，节理发育。物理风化很强烈，风化物和土壤十分疏松，内聚力小，抗蚀能力弱。存在着水土流失的潜在地质条件。另外，石英砂岩峰林地貌本身的地貌特点，水文气象要素都促使其山体风化、崩塌，景观消亡。为了保证景区的可持续发展，环境保护意义重大。

A Study on Zhangjiajie Quartz Sandstone Landform Genesis

On the basis of investigation and analysis remot sensing images, the research conclusions as follows: the basic shape in Zhangjiajie is bring up by stratum flat, lithosphere uplifting, denudation along breahing joint and gravitation dilapidation etc. The substance bedrock keeping this basic shape is a specifically lithology. The rock is mostly make up of pure sandstone. The lithology is bad cementation, joint developing, physics weather- ing is intensity, weathering matter and soil is full loosen, cohesion is small, resisting weathering is feebleness. concave developing is frequent in steep cliff and channel ,phenomena of gravitation dilapidation is at large. So, Zhangjiajie have latency geology conditions in water and soil losing. In addition, quartz sandstone landform de- veloping characteristic and water weather etc. inpel hill weathering, falling and die out. For ensuring sight de- veloping, the research on protecting environment is signalitily.