sandstone dike
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河南省嵩山地区中—新元古代五佛山群沉积岩中发育几百条砂岩岩墙、砂岩岩脉和砂岩岩床 ，形成一个壮观的砂岩岩墙群。
Numerous sandstone dikes and sills (about 230) were dominantly found in the shales of the Puyu Formation, and formed a large swarm of sandstone dikes.
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