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Product Description
Petrified Wood Schilderia Round Polished Rock Arizona
This lovely piece of Petrified Wood, Schilderia, is a full "round" (bark all the way around-though one edge is very thin), slabbed and polished on one side, natural rough on the back.
The Petrified Wood round is 6 inches long by 3.5 inches wide and 1 inch at its thickest.
Schilderia is a very rare distinctive gymnosperm genus found in Triassic aged deposits. Schilderia was a large tree with a solid woody cylinder. This genus can be easily recognized by its large rays, which are clearly visible to the naked eye.
The most important find in the world of Petrified Wood is in Northern Arizona. The majority of the petrified wood here is Araucarioxylon arizonicum, a prehistoric type of conifer.
This Petrified Wood is found in the Chinle Formation and comes from the Triassic Period around 220 million years ago.
In Northern Arizona tree trunks as large as 213 feet long were buried under several hundred yards of sediment. Over the course of time the wood was replaced by cryptocrystalline quartz, largely chalcedony and jasper.
In 1988 the Arizona state legislature designated petrified wood the Arizona state fossil.
This "Petrified Forest" was made a National Park in 1962. This piece was from an old collection and was self collected in the 40's or 50's, prior to the establishment of the park.
