exposing the mouth of a lava tube. A lava delta is created when molten rock reaches a flat area and spreads out in multiple directions like a fan. After this lava delta collapsed, new lava spewed ...

Jeju Volcanic Island and Lava Tubes together comprise three sites that make up 18,846 ha. It includes Geomunoreum, regarded as the finest lava tube system of caves anywhere, with its multicoloured ...

We have a much better understanding of lava pits and tubes on the moon than we do on Mars. We know some of them are thermally stable at about 17°C (63°F.) We also have better images of them ...

For a unique adventure along the Road to Hana, stop for a self-guided tour of the Hana Lava Tube, which can be found near mile marker 31. It takes no more than 40 minutes to explore about 1/3-mile ...