第四系 按成因类型可分为残坡积与冲洪积物 1、残坡积（Qhesl） ：主要分布于沟谷两侧的坡麓地带。上部为腐 植土， 下部主要为砂土、 混砂石的松散堆积，砂石大小不一， 棱角状， 成分为山头上...
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滑坡由残坡积层、花岗岩风化层、花岗岩基岩等部分构成。
The slope is comprised of residual slope sediments, regolith of granites and bedrock of granite.
残坡积钴矿床因开采条件简单、加工技术性能好而具有较 大的勘查、开发和研究价值。
They bear significant prospecting and study importance because of their simple mining conditions and easy ore processing.
根据成因蓝宝石砂矿层分为冲积砂矿层、洪积砂矿层和残坡积砂矿层；洪积砂矿层中蓝宝石最富。
According to I ts origin, sapphire sand strata are divided into sand wash stratum, pluvial stratum and relict drifted sand stratum, while sapphire concentrated well in drifted sand stratum.
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