Last updated: July 13, 2025
Place
Fleener's Chimney - Spatter Cone
The “chimneys” before you built up as hot gases propelled globs of lava high into the air like lumpy oatmeal boiling over a pot. This lava quickly formed dramatic, hollow spatter cones as it fell back to the ground. Later, less explosive lava flowed out, creating the massive Devils Homestead flow. If you are traveling from the north, you have driven along its entire 3.5 mile (5.6 km) length to the source.
The magma that formed these cones and the flow came up through a long fissure in the ground that runs along Gillem Bluff to your left. Cracks in theearth’s crust like this one allow lava to erupt and form a multitude of different volcanic features.
The magma that formed these cones and the flow came up through a long fissure in the ground that runs along Gillem Bluff to your left. Cracks in theearth’s crust like this one allow lava to erupt and form a multitude of different volcanic features.