1. State Key Laboratory for Continental Dynamics and Department of Geology; Shaanxi Key laboratory of Early Life and Environments and Northwest University; Xian 710069 China
2. State Key Laboratory of Palaeobiology and Stratigraphy; Nanjing Institute of Geology and Palaeontology, CAS; Nanjing Jiangsu 210008 China
3. School of Earth Science and Land Resources; Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education; Chang'an University; Xi'an 710054 China