sea-floor basalt

例句：

1. 1.The sea-floor basalt formation is a fascinating geological wonder.
   海底玄武岩形成是一种迷人的地质奇观。
2. 2. The ancient sea-floor basalt can be used as building materials for modern architecture.
   古代的海底玄武岩可以作为现代建筑的材料。
3. 3.The sea-floor basalt is rich in minerals and can be mined for its valuable properties.
   海底玄武岩富含矿物质，可以被开采以获取其有价值的特性。