An official website of the United States government
Here's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Family of lava tree casts uprift of Pu‘u ‘Ō‘ō.These tree casts formed during the 1965 eruption, when lava flowed through forest. Where the lava came in contact with a tree, it chilled to form a solid rind surrounding the trunk, while the rest of the flow remained molten.Later, as the flow spread laterally, its surface subsided, leaving the solidified crust around the trees standing high. The 1965 flow surface is now buried in cinders from the hgh-fountaining episodes of Pu‘u ‘Ō‘ō.