Carbon isotope characteristics of the Middle-Upper Cambrian Xixiangchi Group and bottom boundary marks of Furongian Series in the Sichuan Basin and its adjacent areas
Keywords: کامبیر دیر; Sichuan Basin; Late Cambrian; Xixiangchi Group; Furongian Series; Stratigraphic mark; Carbon isotope; Positive excursion; GR; Sedimentary environment;