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Craters Of The Moon National Monument and Preserve - Fossils![]() In a rare example of fossils preserved in igneous rocks, dozens of tree mold impressions are preserved in the basaltic lava flows and in lava tubes. These impressions were formed as lava flowed around a fallen tree. The molds typically show shrinkage cracks. Moisture in the wood may have prevented incineration of the trees. Similar tree molds are known from other NPS areas including El Malpais National Monument, Hawaii Volcanoes National Monument, Lava Beds National Monument, and Pu"uhonua o Honaunau National Historic Park. |
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Craters Of The Moon National Monument and Preserve - Fossils
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