Crediting Information

Images and maps created by the USGS are public domain unless a copyright restriction is posted.

Copyright

Images, maps, data, and information authored or produced by the USGS Astrogeology Research Program are in the public domain. While the content of most of our web pages is in the public domain, not all the information on our site may have that status. Some images/graphics used by the USGS Astrogeology Research Program have copyrights owned by other parties, and will have copyright information noted. For other uses, you may need to obtain permission from the copyright holder under the copyright law.

Use of the USGS visual identifier (logo) is restricted to official publications.

We identify material we use from sources outside of USGS, and request others do the same when using information published by USGS. Credit can be provided by including on the page (or via a link to a credits page) a citation such as those listed below.

On Websites

The link may also be directly to the webpage where the image or map was downloaded.

In Papers

For citing a specific person as the source for an image or map, fill in the name of the principal investigator in the following, where the principal investigator is the person (or people) listed as the principal investigator, primary author, or project leader.

For citing the Program in general as a reference.

The listed web address may also be directly to the webpage where the image or map was downloaded.

In Captions

The link may also be directly to the webpage where the image or map was downloaded.

References

Formal bibliographic references to journal articles, web pages, or other publications should follow the writing style standard being used for the reference page.