Global Volcanism Program | Image GVP-05830

The flat, grooved surface of this lava block was sandblasted by high-velocity pyroclastic surges during an eruption in 1775. The pyroclastic surges accompanied formation of the 700-m-wide Tolire Jaha maar on the NW flank of Gamalama. Photo by Jack Lockwood, 1980 (U.S. Geological Survey).

The flat, grooved surface of this lava block was sandblasted by high-velocity pyroclastic surges during an eruption in 1775. The pyroclastic surges accompanied formation of the 700-m-wide Tolire Jaha maar on the NW flank of Gamalama.

Photo by Jack Lockwood, 1980 (U.S. Geological Survey).

Creative Commons Icon This image is made available under the Creative Commons BY-NC 4.0 license terms.

Gamalama