《Table 1 Weathering indices evaluated in this study》

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《"Origin of the Mushroom Stone Forest at the southeastern foot of the Little Sangpu Mountain in eastern Guangdong,China: A palaeo-sea-level indicator or not"》

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Notes:R=Ruxton Ratio；CIA=Chemical Index of Alteration；WIP=Weathering Index of Parker

The collected samples were ground and ballmilled to-250μm for chemical analysis.The major elements of the samples（such as oxides SiO2，Al2O3，Fe2O3，K2O，Na2O，CaO，MgO，MnO，P2O5and TiO2）were measured by a fully integrated X-ray fluorescence（XRF）spectrometer（Epsilon 5）and LOI（loss on ignition）of the samples was determined gravimetrically after the samples were ignited for the XRF testing at the School of Geography，South China Normal University.The X-ray results were further studied by calculating three widely used weathering indices（Ruxton Ratio–R；Chemical Index of Alteration-CIA；Weathering Index of Parker-WIP）obtained from the relevant literature（Ruxton 1968；Nesbitt and Young 1982；Parker 1970）.Table 1 outlines the indices evaluated in this study.