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本区莲花口组为一套内陆冲积扇、河流、湖泊相沉积,缺乏遗体化石,但遗迹化石丰富。遗迹化石呈不规则弯曲管状,其生态类型为垂直管型—斜交管型—水平管型潜穴,是一种淡水环境中的蠕虫动物(vermes)所造成的栖息、居住及简单觅食痕迹。虫迹多见于砂岩及粉砂岩向泥岩过渡的层位,分布集中,排列紊乱。代表河、湖边具有硬底的小坑洼中的停泄水环境。研究这些虫迹可以判断沉积环境及对比地层。
Lianhuakou Formation in this area is a set of inland alluvial fans, rivers and lakes, lacking remains of fossils, but rich in trace fossils. The fossil remains irregularly bent and has the ecotype of a vertical tube - skewed tube - horizontal tube. It is a habitat, habitat and simple foraging trail caused by vermes in freshwater environments. Insects more common in the sandstone and siltstone to mudstone transitional layers, the distribution of concentration, disorder. On behalf of the river, the lake has a hard bottom pit depression in the water environment. Studying these traces can determine sedimentary environment and contrast stratigraphy.