Basalt is usually formed when lava solidifies on the earth’s surface ... The sediment comes from eroded rocks carried there by rivers or ice, and from the skeletons of sea creatures.

Kilauea volcano began erupting and shooting lava into the air once again Tuesday on the Big Island of Hawaii. The latest release of molten rock began 10:16 a.m. with lava flowing on to the floor ...

Now, an investigation of ancient lava formations by ... among those who thought the rocks were volcanic, which has since proved to be the case. That means wind erosion likely scoured sedimentary ...