A petrified forest in which tree trunks have fossilized as petrified wood. A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological heritage age. The silicified trunk have been preserve in life position. Algal stromatolite can be observed upon some of the stumps. Oncolite is sedimentary structures composed of oncoids, which are layered structure formed by cyanobacterial growth. Protocupressinoxylon purbeckensis silicon thrombolite dendrochronology jurassic miocene paleoclimate volcanic eruption oncoid earth soil rock strata surface timescale chemofossil biochemical paleontology. Escalante state park utah purbeck dorset curio bay gilboa santa cruz deseado specimen ridge sarmiento lesbos jaramillo national ginkgo wanapum recreational area. Cracked bole branch body agatized log prehistoric times UHD 4K 3840×2160.