The Discovery and Its Stratigraphic Significance of Conodont Hindeodus Parvus of Luolou Formation in Guoxing area of Northwest Guangxi
In the 1∶50000 equal-amplitude regional survey of Pojiao,in the measured Luolou formation pro-file in Longlin,Guangxi,an important conodont Hindeodus Parvus(Kozur and pjatakova)was found on the 5 th floor.At present,the first appearance of Hindeodus parvus is considered to be the beginning of Triassic at home and abroad.The last conodont Hindeodus praeparvus(Kozur)was found in the 4 th floor,and there were many ostracods in the upper part of 4th floor.This shows that there is an important geological boundary between the fourth and fifth layers of Luolou formation in Guoxing section,it is the Permian-Triassic boundary.Two conodont zones:Hindeodus praeparvus and Hindeodus parvus,are divided from bottom to top.They represent the highest conodont zone in Changxing stage of Upper Permian and the first conodont zone in Indian stage of Lower Triassic respectively.
万方数据
维普
