海南岛是否存在泥岔系?是该岛及华南地区长期悬而未决的重大基础地质问题之一。由于没有直接的古生物依据,以往多数研究者认为该地区不存在泥盆纪沉积。但亦有学者根据早石炭世早期化石的存在,推测其下伏地层可能为中—晚泥盆世。这一地质时期记录的长期不确定,极大地影响到对该岛和华南地区区域地质发展史和大地构造性质以及构造演化等问题的正确理解,也影响到冈瓦那大陆离散和亚洲大陆增生等地质理论的科学阐述。近年来,我们采获较丰富的牙形刺化石,从而肯定海南岛确实存在泥盆纪地层。标志着对这一疑难地层问题的研究取得了突破性进展。 Whether there is a muddy fork in Hainan Island? Is the island and South China long-term outstanding one of the major underlying geological problems. In the absence of direct paleontological evidence, most researchers in the past thought that there was no Devonian sediment in the area. However, some scholars speculate that the underlying strata may be mid-late Devonian based on the existence of early Early Carboniferous fossils. The long-term uncertainty of records in this geologic period has greatly affected the correct understanding of the regional geological history and the tectonic and tectonic evolution of the island and South China, as well as the dispersion of the Gondwanaland and the proliferation of the Asian continent Scientific explanation of geological theory. In recent years, we have obtained a lot of conodont fossils, which confirms the existence of the Devonian strata in Hainan Island. This marks a breakthrough in the study of this difficult formation.