四川马边丹霞地质遗迹特征概述

Characteristics of Danxia Geoheritages in Mabian Yi Autonomous County, Sichuan Province

受四川盆地坳陷分区(峨眉山-成都-万州)特殊地质背景与生态环境的影响,环崖丹霞为马边地区区别于其他传统丹霞地貌区的典型代表,以“环崖、顶平、麓缓、无瀑”为主要组合特征,主要表现为侧向侵蚀和重力崩塌等作用形成,成因机制较为独特。马边环崖丹霞另以规模宏大,形态独特的弧形绝壁为特色,环崖平面闭合度可达200°~300°,蔚为壮观,具极高的研究价值和对比分析意义。马边丹霞地质遗迹分布广泛,微地貌类型丰富、独特,发育有环崖绝壁、孤峰、长墙、峰丛、方山、崖壁、城堡、石柱等多种微地貌景观,类型多样、形态独特、特色鲜明,极具地区代表性。

The Danxia geoheritages in Mabian is characterized by ring cliff,flat roof,foot slowly,no waterfall due to affection of special geological background and ecological environment in the Emeishan-Chengdu-Wanzhou depression of the Sichuan basin.The Danxia geoheritages resulted from lateral erosion and gravitational collapse.The ring cliff with the plane closure of 200°-300°is characterized by a large-scale,unique shape of the arc-shaped precipice and is of great research value.The ring cliff with isolated peaks,long walls,clusters of peaks,mesa,cliffs,castles and pillars are very regionally representative.