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Oregon Caves National Monument100 years of Discovery
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Oregon Caves National Monument
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About Oregon Caves

Oregon Caves is a unit of the National Park Service and encompasses 450 acres which contain a three-mile cave system, old-growth forest, pristine watershed and a National Historic Landmark, the Oregon Caves Chateau. It is located at an elevation of 4,000 feet in the Siskiyou Mountains, a region identified for its rare geology. Several National Parks, Wilderness Areas and State Parks are located near the Monument. Find more about regional activities.

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Acid dew dissolves the cave wall to make small pock marks.  

Did You Know?
Carbon dioxide mixes with water that condenses on the wall of the cave to create a very weak acid. Over long periods of time this "acid dew" eats away at the marble walls of Oregon Caves making the cave larger.

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Last Updated: April 28, 2009 at 20:42 EST