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鄂尔多斯盆地是我国著名的大型内陆沉积盆地之一,中生代地层十分发育,具丰富的矿产资源。盆地西南部下白垩统志丹群,自上而下可划分为峰山、泾川、罗汉洞、华池-环河和洛河-宜君等五组。轮藻化石主要集中分布在该群的中、上部,特别是陇县麻地沟、火烧寨、峰山南坡等地的峰山组和泾川组中,国内首次发现了棒轮藻科(Clavatoraceae)营养体化石,为该科的分类与演化研究提供了重要的新资料。
The Ordos Basin is one of the famous large-scale inland sedimentary basins in China. The Mesozoic strata are well developed with rich mineral resources. The Lower Cretaceous Zhidan Group in the southwest of the basin can be divided into five groups: Fengshan, Jingchuan, Lohan Cave, Huachi-Huanhe and Luohe-Yijun from top to bottom. The chalcedony fossils are mainly distributed in the middle and upper part of the group, especially in the Fengshan Formation and Jingchuan Formation of the Madi ditch, Huoshazhai and the southern slope of Fengshan in Long County, and Clavatoraceae nutrition was first discovered in China Body fossils, for the classification and evolution of the study provides important new information.