VHP Photo Glossary: Skylight

Lava tube skylight with person for scale, Kilauea Volcano, Hawai`i

Scientist takes advantage of a skylight to measure height of lava flowing in a lava tube, Kilauea Volcano, Hawai`i. Photograph by K.V. Cashman in 1994


A skylight is an opening in the roof of a lava tube. Skylights usually form when part of the roof collapses into the tube, but they also occur where a roof failed to form over the lava channel. If the tube is active, a stream of glowing lava can be seen moving below.

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