sand rock

• 砂岩

sand rock的用法和样例：

例句

1. This pedestal rock began as a mass of pebbly sandstone.
   这基座般的岩块开始是一堆含很多卵石的砂岩。
2. Sandstone and conglomerate are the consolidated equivalent of sand and gravel.
   砂岩和砾岩分别是砂和砾石固结的产物。