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Araucarioxylon arizonicum (alternatively Agathoxylon arizonicum) is an extinct species of conifer that is the state fossil of Arizona. [1] The species is known from massive tree trunks that weather out of the Chinle Formation in desert badlands of northern Arizona and adjacent New Mexico, most notably in the 378.51 square kilometres (93,530 acres) Petrified Forest National Park. [2]
Fossil wood may or may not be petrified, in which case it is known as petrified wood or petrified tree. The study of fossil wood is sometimes called palaeoxylology, with a "palaeoxylologist" somebody who studies fossil wood. The fossil wood may be the only part of the plant that has been preserved, with the rest of the plant completely unknown ...
Petrified wood has also been discovered in Dholavira in Kutch, Gujarat, dating back to 187–176 million years. [24] Japan – there is a fossilized forest preserved at Sendai City Tomizawa Site Museum; Indonesia – petrified wood covers several areas in Banten and also in some part of Mount Halimun Salak National Park.
A piece of petrified wood in situ, Highlands Ranch, Colorado. The Denver Basin contains relatively few late Paleocene-age strata–with many dating to older periods–but laser ablation sampling in 2015 compared with a core sample from Castle Pines 2.5 kilometres (1.6 mi) away has been interpreted as indicating this more recent date.
Petrified wood was discovered in the region in the early 1930s, which led to creation of the state park as a national historic preserve. [2] Over 50 species are found petrified at the site, including ginkgo, sweetgum, redwood, Douglas-fir, walnut, spruce, elm, maple, horse chestnut, cottonwood, magnolia, madrone, sassafras, yew, and witch hazel.
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Agate House is a partially reconstructed Puebloan building in Petrified Forest National Park, built almost entirely of petrified wood. The eight-room pueblo has been dated to approximately the year 900 and occupied through 1200, of the Pueblo II and Pueblo III periods. The agatized wood was laid in a clay mortar, in lieu of the more usual ...
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