Global Volcanism Program | Image GVP-03422
This heart-shaped tree mold was produced during an eruption along the East Rift Zone that began on 7 October 1968. Molten lava solidified around the tree, which eventually burned away, leaving the mold with incandescence from the hot rock below.
Photo by Don Swanson, 1968 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.