摘要
马里是西非红色岩系和丹霞地貌最发育的国家。红色岩系面积约360000km^2,覆盖国土面积的近1/3,其中110000 km^2形成为高高原,丹霞地貌极为发育。本文结合实地考察,介绍了马里红色岩系的分布状况;并从地质历史、构造、古地理环境的角度分析了红色岩系形成的地质基础;最后着重对马里著名的红色砂岩高原、山地——曼丁哥、多贡和洪博里丹霞地貌的特点及其发育过程进行了初步分析,比较,并且对照中国丹霞地貌的形成和分布特征,指出了马里丹霞地貌的研究价值。
Mall is a country with the most developed red series of rocks and the Danxia geomorphology in west Africa. Having an area of around 360 000 km^2, the red series of rocks cover nearly one third of the territory of Mali, and constitute greater part of the plateau, in which the area of high plateau of 110 000 km^2 is composed principally by red sandstone and conglomerate, thus foming the vast expanse of developed Danxia geomorphology in Mali, distributing from the West and the South right up to the East.
Based on field work and from the angles of geological history, structure and Paleoenvironment, the evolution of Danxia geomorphology and its characteristics of famous red sandstone plateau and mountain in Manding, Dogon, Hombori of Mall are analysed and examined in this paper. According to stratigraphical timescale, they are part of Pre-cambrian; judged by the environment of evolution, they are formed in the tectonic movement taking epeirogenic movement as the dominant factor and under an ancient dry geographical condition; in accordance with the topography, they are fully developed possessing various forms and very developed grand cliff. As compared with Danxia geomorphology of China, they are noted for their old stratigraphie age, continuous distribution over a grand area and magnificent form, these are of great value for study.
出处
《热带地理》
北大核心
1993年第2期184-192,共9页
Tropical Geography
关键词
马里
红色岩系
丹霞地貌
地貌
Red series of rocks
Danxia geomorphology
Sandstone plateau
Mali
