US Dollar
Australian Dollar
Euro
CAD
Product Description
Petrified Wood Polished Rock Grassy Mountain Oregon
This pretty polished Grassy Mountain Petrified Wood piece is 5.6 inches by 4 inches and it is 1 at its thickest.
It is a slanted cut of the tree and has about 3/4 around "bark" and 1/4 or one side broken away (right side first picture). The rest is natural rough.
This petrified wood piece is from the Kirkby collection and was self-collected sometime in the 1930's to the 1960's.
Grassy Mountain is a remote high desert rockhounding destination in Malheur County, near Owyhee Lake, Oregon and is well-known for the excellent quality of petrified wood.
The Grassy Mountain Formation of southeastern Oregon is from the Middle-Miocene age about 12.5 million years ago.
The conifer wood, which typically has well-preserved cellular structures, appears in shades of gorgeous yellow as well as beige, brown, orange, gray, and black.
Petrified Wood formed when a tree died and was quickly buried by sediments. Minerals in the groundwater then permeated the wood, replacing the original organic matter and turning it to stone. The main mineral is silica, but trace elements in the silica create a variety of colors.
For over a century, fossilized remains of stumps, logs, and branches have been recovered from several localities near Grassy Mountain.
