Sandstone, mudstone and limestone rock-debris have a very wide distribution and are very frequently used as dam materials in Sichuan Provi- nce.

砂岩、泥岩和灰岩石碴料是四川省分布广，使用最多的几种坝料。

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Fan Xiao, the chief engineer of the Sichuan Geology and Mineral Bureau, believes this quake may have been an aftershock of the Wenchuan quake, thus possibly also dam-related.

四川省冶金地质勘查局的总工程师范晓认为，这次地震可能是汶川地震的余震，就是说也可能是水坝引发的。

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Zipingpu Multi-purpose Dam Construction Project is located at Yingxiu-Dujiangyan reach, upstream of Minjiang river, west Sichuan.

紫坪铺水利枢纽工程位于四川省西部的岷江上游，映秀至都江堰市沙金坝河段上。

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