Specimens from one of the world's most spectacularly varied fossil forests can be seen here on a 7,470-acre site that encompasses prehistoric swamp and lake beds repeatedly inundated by lava. Felled trees from the dense forests of the Miocene Epochnot just the ginkgo for which the park is named, but some 200 other specieswere preserved beneath the solidified basalt, gradually turning to brilliantly colored stone as mineral deposits replaced their cell structure. Ice Age erosion brought them to light again.
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