Braided arenaceous fluvial channels were developed, and paludal coal-bearing sediments were well developed from Yan 9 to延 9至延 +期网状砂质河道发育 ,西部地区广泛发育平原沼泽煤系沉积。
The distribution feature is that in calico purple soil rice and corn are short of zinc,in acid arenaceous soil wheat is 分布特征是钙质紫色土水稻、玉米缺锌 ,酸性砂质土小麦缺钼 ,砾质黄壤油菜、柑桔缺硼 ,潜育化潮土小麦缺锰。