将“sandstone"翻译成中文

It is located underneath sandstone hills, surrounded by lowlands with predominantly saline groundwater.

它位于砂岩丘陵之下,周围是主要含咸水的低地。

As the canyon widens, the tourist enters a vast natural amphitheater of sandstone walls riddled with caves.

随着峡谷通道越来越宽,游客会进入一个宽广的盆地,四周都是布满洞穴的沙岩峭壁。