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Hawai'i Volcanoes National ParkNative hapu`u tree ferns abound in the rain forest
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Hawai'i Volcanoes National Park
Park Planning and Projects
`a`a flowing over an older flow of pahoehoe.  

Did You Know?
The two types of Hawaiian lava differ in appearance but are chemically alike. Pahoehoe has a smoother and ropey surface where `a`a is jagged and clinkery.

Last Updated: July 08, 2009 at 17:34 EST