This image was acquired from
flickr. 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:
fossil paleobotany yellowstone national park yellowstonenationalpark YELL The fossil fern leaf and stem impressions featured here were discovered in northern Yellowstone National Park. Collecting any natural resources including rocks and fossils is illegal in Yellowstone. Photo by Megan Norr March Catalog Original YELL YELL The