详述扬子区晚奥陶世晚期 (阿什极期 )至兰多维列世初期的生物带序列 ,修正部分的笔石带 ,与全球各重要地区进行对比。研究表明 ,全球奥陶系顶部赫南特亚阶及其上下地层在我国的扬子区发育最好 ,地层连续发育并广泛出露 ,生物带发育齐全 ,不但有连续的笔石带 ,而且有世界广布的赫南特贝腕足动物群 ,有望在我国建立赫南特亚阶的全球层型剖面和点(GSSP)。 A detailed description of the sequence of biological belts in the late Ordovician (Ashe period) to Early Dravidian Periods in the Yangzi area was made, and some of the pen-stone belts were amended to compare with the major regions of the world. The study shows that the top Hernartya and its upper and lower stratigraphy of the Ordovician in the world have the best development in the Yangtze area of ​​our country. The strata develop continuously and are widely exposed. The development of the bio-belt is complete. There are not only the continuous pen-stone belt but also the world The widespread Hernnumberg brachiopods are expected to establish the Herrenate-Stratospheric Global Profile and Point (GSSP) in our country.