四川宣汉百里峡地质遗迹成因与景观价值分析

Geosites Genesis and Landscape Value Evaluation in Baili Gorge of Xuanhan

百里峡地质公园以典型的峡谷、构造地质剖面以及其与溶洞、古生物化石等地质遗迹组合的完整性、系统性为景观特色。地质构造、水流侵蚀、岩溶作用是百里峡地质遗迹景观成因的主导因素,尤其是与褶皱构造变形关系极为密切。从百里峡切割并形成于褶皱构造山系(特别是梳状褶皱山系)这一特征来看,百里峡与长江三峡属于相同峡谷类型,在景观特征上具有诸多相似之处。经定量评价,峡谷地貌、褶皱构造和溶洞是公园导向性的A级地质遗迹景观;而众多的峰丛、象形山石等为B级地质遗迹景观。

The landscape features of Baili Gorge Geopark fall in typical canyon,structural geology sections,integrity and systemic combination of geosites landscapes.Geological structure,stream erosion and karstification are dominant in the genesis of Baili Gorge Geopark,especially drape structure distortion.Judging from these characteristics,Baili Gorge and the Three Gorges of Yangtze River belong to the same type,with similarities in landscape features.By quantitative evaluation,canyon landform,fold and Karst caves are A level in geological vestige landscape.Large numbers of peak clusters and pictographic rocks rank B level in geological vestige landscape.