Explorations into lava tubes in the Grand Brûlé. Lava tubes are a type of lava cave formed when a stream of low viscosity wash
Explorations into lava tubes in the Grand Brûlé. Lava tubes are a type of lava cave formed when a stream of low viscosity wash active continuously develops a hard crust, which is thick and forms a roof over the lava stream still flows freely. The tubes are formed in one of two ways: by crusting of lava channels and lava flows Pahoehoe where it moves beneath the surface. Lava usually leaves the point of eruption in channels. These channels are often very hot as their surroundings cool.
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