Global Volcanism Program | Image GVP-02970
This aerial view of Mount Hood from the south shows the Crater Rock lava dome in the center of the photo. Formation of the 400-m-wide, 170-m high Crater Rock dome is dated at about 1765 CE from tree-ring counts of wood in mudflows associated with growth of the dome. Episodic dome growth and associated pyroclastic flows and lahars took place until about 1800 CE.
Photo by Willie Scott, 1990 (U.S. Geological Survey).