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A study on the cause of weathering for ancient sandstone carvings in Sichuan

Zeng Zhongmao;Board of Cultural Relics Management of Sichuan Province;  
This paper describes that the samples have been gained in seven ancient sandstone carvings in Sichuan.Their physical property has been measured.Their component has been analysised by X-ray diffractometer.More over,it is discussed to combine the result of examination with the local climate and present state of ancient sandstone carvings.Cause of weathering for ancient sandstone carvings in Sichuan are the porosity and mud in the sandstone,erosion and rushing of the rain,wearing of the wind and environmental pollution.
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