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Tree Molds

Volcano, United States of America

Tree Molds

A lava tree mold, sometimes erroneously called a lava tree cast, is a hollow lava cylinder formed around a tree trunk. These hollow volcanic landforms are produced when lava flows through a forest, coating the trees' trunks. The lava cools just enough to create a solid crust around the trunk, but th

e tree inside burns away, leaving a cavity. Molds of trees may be vertical (tree still in place) or horizontal (uprooted tree). In many cases, the mold formation requires slow-moving lava, as well as enough time for the mold to chill.

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