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6-12

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Dating Lava Flows on Mauna Loa Volcano, Hawaii

Scientists search for carbonized remains of plants preserved in lava flows to find out how long it has taken rain forests on Hawaiʻi to regenerate after a volcanic eruption in this NOVA video. For hundreds of thousands of years, lava flows have created intricate patterns on the slopes of Hawaiʻi's Mauna Loa volcano. Until the mid-1970s, it was impossible to know when each of the flows occurred.

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