The Lone Tree | Yellowstone The acidic or alkaline water and steam runoff from nearby geysers killed these trees. Several geysers are steaming in the background. The water steam flow periodically floods the area, killing the lodgepole pine trees. Then silica precipitated upon the dead tree trunks creating the white “bobby sock” trees. This silica slowly impregnates the wood and over time, could eventually petrify the wood. For the whole story with all images, see The Lone Tree | a 7 Image Story.
