Lavacicles, a common feature, are squeezed out of a lava tube’s roof by gases under high pressure and then cooled mid-drip. The gooey appearance of a rock wall in Manu Nui cave was formed when ...

Approximately 700,000 years ago when molten rock erupted from a vent in nearby Hart Prairie, the mile-long Lava River Cave was formed. Today, visitors can explore the cave's cool, dark expanse by ...

"We verified that the cave characteristics we were measuring ... the geologic history that may be preserved inside this lava ...

With its iconic mountains, rivers, and coastline, it’s easy to overlook the adventure of discovering some of Oregon’s ...

Lava tube caves take you deep into ancient volcanoes, where molten rock once carved tunnels in the earth. These underground ...

Hallmundarhraun, just a few hours’ drive from Reykjavík, is riven with lava tubes which form when fresh molten rock flows through ... But the cave is no minor feature. It is giant-scaled, ...