description Big Skylight Cave Overview
Big Skylight Cave is a lava tube located within the El Malpais National Monument in New Mexico. It is distinguished by a large ceiling collapse, or skylight, that allows natural light to illuminate its dark interior. The cave was created by ancient basaltic lava flows that left behind extensive subterranean tunnels as the molten rock drained away. Today, the cave provides a navigable route for hikers and cavers exploring the monument's rugged volcanic landscape.
help Big Skylight Cave FAQ
Why is Big Skylight Cave called a skylight cave?
Big Skylight Cave is named for its large ceiling collapse, which opens the lava tube to the sky. That opening allows natural light to reach part of the otherwise dark interior.
Where can I find Big Skylight Cave?
Big Skylight Cave is located in El Malpais National Monument in New Mexico. It formed from ancient basaltic lava flows in the monument's volcanic landscape.
Is Big Skylight Cave naturally lit?
Only part of Big Skylight Cave receives natural light through the large skylight opening. Sections beyond the collapse remain dark because the cave is a lava tube.
How did Big Skylight Cave form?
Basaltic lava flowed across the landscape and cooled on the outside while molten material continued beneath the crust. When the interior lava drained away, it left a subterranean tunnel that later developed a large roof collapse.
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