Laavuluoli
Laavuluoli is a Finnish term that translates to "lava tube" in English. It refers to a natural underground tunnel formed by the flow of molten rock. When a volcano erupts, the outer surface of a lava flow cools and hardens, while the molten lava beneath continues to flow. Eventually, the lava drains away, leaving behind a hollow tube.
These geological formations are found in volcanic regions around the world, and Finland, with its volcanic
Lava tubes are of interest to scientists and geologists for several reasons. They provide insights into the