1. Key Laboratory of Economic Stratigraphy and Palaeogeography; Nanjing Institute of Geology and Palaeontology; Chinese Academy of Sciences; East Beijing Road, 39 Nanjing 210008 China
2. GeoZentrum Nordbayern; University of Erlangen-Nürnberg; Loewenichstr. 28 Erlangen 91054 Germany