Sand was deposited which hardened into sandstone.
沙经沉积固结形成沙岩。
The result is that sandstone, for example, can be as porous as the loose sand from which it was formed.
因此，举个例子，沙岩可以和构成它的疏松的沙粒一样具有多孔渗水的特点。
Sandstone and conglomerate are the consolidated equivalent of sand and gravel.
砂岩和砾岩辨别是砂和砾石凝结的产品。
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