This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
TRACES OF IRON OXIDE GIVE REDDISH HUE TO THIS ROCK FORMATION NARA .tif Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor Norton Boyd Photographer File TRACESOFIRONOXIDEGIVEREDDISHHUETOTHISROCKFORMATIONNARA tif tif File TRACESOFIRONOXIDEGIVEREDDISHHUETOTHISROCKFORMATIONNARA NARAcooperation