Skylight
Volcano Learning zone > Volcano Glossary
A Skylight is an opening in the roof of a lava tube. Basaltic lava can be seen flowing through the tube. Skylights in old lava tubes provide light and moisture to enable plants to grow. 
Volcano Learning Zone
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A Skylight is an opening in the roof of a lava tube. Basaltic lava can be seen flowing through the tube. Skylights in old lava tubes provide light and moisture to enable plants to grow.