sandstone blocks and wolverine petrified forest

ancient area bench brown bureau burr canyon chinle colorado confiers county cracked dinosaurs epoch era escalante fallen forest formation fossil fossilized garfield geology grand gray gulch jurassic land landscape log management millions mineralization monument mudstone national natural north old period permineralization petrified plateau polished red redwood rock sequoia staircase stone study stump the trail travel tree triassic utah visit white wilderness wolverine years