PETROGRAPHIC SUBDIVISION AND SEDIMENTARY ENVIRONMENTS OF THE CAMBRIAN CARBONATE ROCKS IN THE XIADONG AREA

1. Introduction The most developed area of Cambrian carbonate rocks in China is the Xiadong area in the west of Hubei Province, including Yichang, Zigui, Changyang and Yidu . In this area Cambrian carbonate rocks are well exposed and have various types of carbonate rock containing abundant fossils. One of the standard sections of Chinese Cambrian is also in this area. As early as in the early 20th century, a few foreign scholars, such as Pumpeuy, Richtuofeu, Willes, have made geologica…