The USGS Multimedia Gallery contains a collection of videos, photography, and audio. All items in this gallery are considered public domain and collected as part of the Agency’s work, unless otherwise noted. The content of most USGS websites are in the U.S. Public Domain, not all information, illustrations, or photographs on our site are. Some non USGS photographs, images, and/or graphics that appear on USGS websites are used by the USGS with permission from the copyright holder. These materials are generally marked as being copyrighted. To use these copyrighted materials, you must obtain permission from the copyright holder under the copyright law.