bedrock occur along the Fish Lake trail, the result of an advancing lava flow into a standing forest during the Miocene Epoch. Imagine the snap, crackle, pop and hiss as the trees were overrun by the molten lava. Geology is everywhere, you just have to look!
Old railroad cut exposing a tree mold in the Wanapum Basalt, Priest Rapids Member (15.97-11.63Ma).
Base of another tree mold showing the flaring of the root collar in contact with the underlying paleosol. Note the silicified wood fragments that still exhibit cellular structure.