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Oregon Caves National Monument a doe spotted near the Cliff Nature Trail
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Oregon Caves National Monument
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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: January 24, 2011 at 16:19 MST