일반명 : 나무화석(Petrifiedwood)

학명 : Birch(자작나무)

지질시대 : Miocene (about 20 million years ago)

지층 : Eagle's Nest Area

원산지 : Burns, Oregon, U.S.A.

Oregon is a state rich in fossil wood with several petrified forests. Oregon wood is often very "woody" in appearance.  Wood from Oregon presents a vast array of colour and variety. Oak is very common. Some of the most desirable Oaks in the world are found in Oregon (Swartz Canyon, Stinking Water, Dechutes River). A Well known paleobotonist once identified 60 different species in one acre of land.

McDermitt located in Southeast Oregon close to the Nevada border is famous for it's beautiful and well preserved petrified wood (Cherry).

Another famous place for petrified wood are the Sweet Home deposits in the western foothills of the Cascade Mountain range. The wood is often, but not always, well agatized and extremely well preserved. Very unusual is a agate replacement where the tree rotted before being petrified, and the void it left in the ashen earth was slowly filled in with agate.

Grassey Mountain and Hampton Buttes produce colourful wood.  One of the finest and most highly desired petrified wood specimens anywhere are the colourful, glass like Grassey Mountain petrified wood specimens from the Succor Creek area ((Eastern Oregon). This wood is easily the most colourful, most agatized petrified wood found in Oregon and rivals the brilliant colour of Bubbard Basin in Nevada!
The Hampton Butte wood is more jasparized than agatized   and is often more a cast than wood replacement, though exceptions to both of these are certainly found. The logs are more often than not fractured, but the colours are unmatched anywhere else. The dominant colour of Hampton Butte is green.