A Petrified Pine
This tree is one of a large number in the petrified forest near Santa Rosa. The trees were overthrown by an earthquake and covered with volcanic ashes at a remote period of the past, and many of them became perfect petrefactions. A forest of large modern trees grows from the soil overlying the petrified forest.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 11 Chapter 6