Unique volcanic structures, known in the literatureas “lava trees” and “tree molds”, have formed atseveral sites on Mt. Etna volcano (northeastern Sicily,Italy). They form when a fluid lava flow runs over a tree,wraps around it and, while the wood burns off, solidifies forming a hollow cast of the tree. The inhabitants of theEtna area call these formations “pietre cannone” (“cannon stones”) because of their cylindrical shape. The first documentation of lava trees is from Hawaii, but the first eye-witnessed accounts of their formation are, to ourknowledge, from Etna’s 1865 eruption. Although many ofthe literature examples of lava trees and tree molds formed in pahoehoe, many of those reported in this work formed in a’a. The sites where we have found the lava tree molds are located within the territory of the Etna Regional Park; most occur next to walking trails and have a high potential forgeotourism.
Lava trees and tree molds (“cannon stones”) of Mt. Etna
IMPOSA, Sebastiano;
2011-01-01
Abstract
Unique volcanic structures, known in the literatureas “lava trees” and “tree molds”, have formed atseveral sites on Mt. Etna volcano (northeastern Sicily,Italy). They form when a fluid lava flow runs over a tree,wraps around it and, while the wood burns off, solidifies forming a hollow cast of the tree. The inhabitants of theEtna area call these formations “pietre cannone” (“cannon stones”) because of their cylindrical shape. The first documentation of lava trees is from Hawaii, but the first eye-witnessed accounts of their formation are, to ourknowledge, from Etna’s 1865 eruption. Although many ofthe literature examples of lava trees and tree molds formed in pahoehoe, many of those reported in this work formed in a’a. The sites where we have found the lava tree molds are located within the territory of the Etna Regional Park; most occur next to walking trails and have a high potential forgeotourism.File | Dimensione | Formato | |
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