Table S1. K-bentonites in Ordovician–Silurian transition from South China: Implications for tectonic evolution in the northern margin of Gondwana LiuWei LiuYuan ZengZuoxun YangBaozhong PengLianhong XuDaliang WeiYunxu LiYaqing EllamRob M. XuSheng 2020 Table S1. Crystal sizes and aspect ratios from 197 zircon grains for K-bentonites in Ordovician–Silurian transition across in nine sections in South China