OddityDrop
All photo credits
PHOTO CREDITS & SOURCES

How Arizona’s ancient trees became quartz

Animals & Nature

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Reporting & fact-checking

National Park Service: Petrified Wood, mineral composition, colors and natural fractures National Park Service: Giant Logs Trail Stop 1, burial and mineral replacement National Park Service: Petrified Forest FAQs, formation over time and protecting the deposits

These credits cover the one unchanged NPS source photograph used for this article. NPGallery explicitly marks the asset Public domain: Full Granting Rights. The source does not identify an individual photographer. January 15, 2008 is the embedded capture date; the catalog’s September 27, 2012 Create Date is a separate metadata date. Original OddityDrop article text is separate from the photograph’s public-domain status.

THE IMAGES

Large reddish-brown petrified log sections lie on a slope overlooking open grassland and a distant mesa beneath a blue sky.
IMAGE 01

Large reddish-brown petrified log sections lie on a slope overlooking open grassland and a distant mesa beneath a blue sky.

Creator / photographer
National Park Service; individual photographer not identified in the source record
Rights holder
National Park Service; public-domain source photograph
License / usage
Public domain (explicit NPGallery designation)
Changes
Original NPS photograph, unchanged. Responsive display sizing only; no text overlays or generated image elements.
Original asset & source

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