迄今所知,南京龙潭范家场为下扬子区晚三迭世煤系地层最发育的地区,地层厚度大,富含动、植物化石。但由于绝大部分为第四纪所覆盖,以及以往在地质勘探中又对古生物化石缺乏足够重视,以致在有关报告或文章中只列举了少数属种,从而使地质工作者对该地层(即范家塘组)的动、植物组合面貌长期认识不清。 So far, the Nanjing Longtan Fanjiachang is the most developed area of ​​the Late Triassic coal-bearing strata in the Lower Yangtze region. The strata have a large thickness and are rich in moving and plant fossils. However, due to the vast majority of Quaternary coverage and the lack of sufficient emphasis on paleontological fossils in geological prospecting, only a few species are listed in the relevant reports or articles, Fan Jiantang group), animal and plant combination of long-term understanding of unclear.