This Specimen has been sold.
7.5" Polished Petrified Wood Round - Sweet Home, Oregon
This is a beautiful, 7.5" wide petrified wood round from the Little Butte Volcanic Formation near Sweet Home, Oregon. It comes from an old collection that I purchased recently that contains a variety of petrified wood slabs from this location. Comes with an acrylic display stand.
Petrified wood is the name given to wood that has been turned into stone (fossilized) through the process of permineralization. All of the organic matter becomes replaced by minerals, while much of the original structure such as tree rings in retained. For this to happen the wood needs to be buried in an environment both low in oxygen (preventing decomposition) and with flowing, mineral-laden water. The coloration is due to the various minerals that are present during fossilization. For example red colors are due to iron compounds, greens due to copper, etc.