Petrified wood is composed of minerals that have replaced the long-decayed wood.

This photo was taken by an Asahi Pentax 6 X 7 medium format film camera and SMC PENTAX 67 1:4 45mm lens with a Zenza Bronica 82mm L-1A filter using Fuji 160NS [220] film, the negative scanned by an Epson Perfection V600 and digitally rendered with Photoshop.