petrified forest |
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navigate by keyword : apache arizona ash bark buried carbon cells cellulose chromium cobalt colorful coniferous copper crystals decomposes decomposition desert enormous eroded forest fossils inhibits iron laden log manganese materials mineral minerals national navajo opal organic oxides oxygen park petrifaction petrified preserved quartz rare rings sediment semi silicate southwest states steppe stone structures terrestrial three tree trees triassic underground united vegetation vibrant volcanic volcanoes western wood woody |
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Petrified Forest National Park in Arizona |
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