Under the water, volcanoes continued to erupt, sending up magma and forming mountains of basalt.
在水下，火山依旧持续喷发，向上喷射岩浆并形成了一座座玄武岩山峰。
2
As they approached the shore, a lanky, suntanned, salt-encrusted 26-year-old stepped out with a splash and clambered up onto a jumble of broken basalt.
Most crystalline rocks are much more solid; a common exception is basalt, a form of solidified volcanic lava, which is sometimes full of tiny bubbles that make it very porous.