In the north area, there are mainly carbonate rocks and shallow sea facies fossil, such as Trilobites, cephalopodes, Brachiopodes and Anthozoans in fossil feature.

 
  • 北区岩性为碳酸盐岩建造,生物以三叶虫、头足类、腕足类及珊瑚等浅海生物为主;
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