紫色土母质的分布及其地质环境——紫色土再研究

Worldwide Distributions and Geological Environments of Parent Rocks of Purple Soil——More Insight into Purple Soil

紫色土的分布决定于其母质——紫色岩石的分布。紫色岩石是红层的主要部分。红层的形成有一定的水热条件限制,当今地表红层的分布状况却与当地的现实水热条件不完全相符。因此,只有从地质历史演进的角度看待今日红层岩石的分布规律。通过讨论红层分布的历史原因,认为紫色岩石的分布是全球性的,紫色土亦然。

Distribution of purple soil depends on distribution of its parent material-purplish rock. Purplish rock is the main component of red beds. The formation of redbeds were limited by water and heat conditions, yet the current distribution of red beds on the Earth surface is not in accordance with local water-beat condition. Consequently, the cause of such distribution was discussed in the context of both historical and geological environment. It is concluded that purplish rocks distribute worldwide and so does the purple soil.