Main group of the hierarchy of legends

The hierarchy of legends is structured on the basis of geological and petrographic criteria based on the soil map of Hesse on a scale of 1:50,000. The basic material of soil formation and its geogens is the essential structural feature.该图例层级体系的构建以基于德国黑森州1:5万比例尺土壤图的地质与岩石学标准为依据。成土母质及其地质成因组分是其核心结构特征。