13.4" Free-Standing, Polished Marston Ranch Jasper - Oregon
This is a very colorful, 13.4" section slab of polished jasper from the Marston Ranch near Ashwood, Oregon. The bas of the section has been cut flat so it displays nicely on a hard surface.
Marston Ranch Jasper is a colorful variety of breciatted jasper that only occurs at the Marston Ranch in Jefferson County, Oregon. Jefferson County falls within the Ash Butte, which is a geologic formation that resulted from settling of volcanic ash along its sides. This environment is perfect for both jasper and petrified wood to form. The exact origins surrounding whether or not this is indeed jasper replaced petrified wood, or a type of jasper formed by a different mechanism, is still up for debate.