Petrified wood with Agate fortifications by sysadmin | Jun 28, 2016 | BlogPetrified wood with Agate fortifications- Pepper Tree (Schinoxylon actinoporosum)- Blue Forest, Fontenelle, Wyoming. Eocene epoch – 50 mya. 5.25″ across…. This slab is loaded with bug borings and frass.