アメリカ自然史博物館のインスタグラム(amnh) - 4月25日 02時42分

Happy Arbor Day!
Pictured is a piece of petrified wood, collected from Chalcedony Park, Arizona.
Petrified wood forms when trees are buried and over many years minerals seep in, slowly turning them to stone while preserving the structure of the ancient wood. This specimen is located in the Museum's Guggenheim Hall of Minerals.
#ArborDay #FossilFriday

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