Approximately 30 million years ago, vast expanses of today’s West began stretching apart along an east–west axis. This ongoing stretching process increased about 17 million years ago and created the modern basin and range topography (north–south mountain ranges with long north–south valleys) which characterizes much of the West, including the Yellowstone area. In 2003, changes at the Norris Geyser Basin resulted in the temporary closure of some trails in the basin. New fumaroles were observed, and several geysers showed enhanced activity and increasing water temperatures. Several geysers became so hot that they were transformed into purely steaming features; the water had become superheated and they could no longer erupt normally. [95] This coincided with the release of reports of a multiple year United States Geological Survey research project which mapped the bottom of Yellowstone Lake and identified a structural dome that had uplifted at some time in the past. Research indicated that these uplifts posed no immediate threat of a volcanic eruption, since they may have developed long ago, and there had been no temperature increase found near the uplifts. [96]

Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference Janetski, Joel C. (1987). Indians in Yellowstone National Park. Salt Lake City, Utah: University of Utah Press. ISBN 978-0-87480-724-0. Fire Monitoring". Yellowstone Wildland Fire. National Park Service. October 25, 2006. Archived from the original on February 6, 2007 . Retrieved March 21, 2007. Wheeler, Olin Dunbar (2010). Enlarge Image Nathaniel Pitt Langford: The Vigilante, the Explorer, the Expounder and First Superintendent of the Yellowstone Park. Nabu Press. ISBN 978-1-177-37550-4.Punke, Michael (2007). Last Stand: George Bird Grinnell, the Battle to Save the Buffalo, and the Birth of the New West. Smithsonian Books. p.102. ISBN 978-0-06-089782-6.

Archive of Stories About the Yellowstone Volcanic System". Yellowstone Volcano Observatory. U.S. Geological Survey. February 2, 2007. Archived from the original on February 10, 2007 . Retrieved March 12, 2007. a b Schullery, Paul. "The Greater Yellowstone Ecosystem". Our Living Resources. U.S. Geological Survey. Archived from the original on September 25, 2006 . Retrieved March 13, 2007. Exotic Vegetation Management in Yellowstone National Park" (PDF). Nature and Science. National Park Service. February 1, 2006. Archived (PDF) from the original on June 12, 2007 . Retrieved March 13, 2007. Weitz, Olivia (June 22, 2022). "Yellowstone National Park partially reopens after floods". NPR . Retrieved June 24, 2022.Rappaport Clark, Jamie (March 21, 2020). "We Were Wrong About Wolves, Here's Why". Defenders of Wildlife . Retrieved June 7, 2023. In May 2001, the U.S. Geological Survey, Yellowstone National Park, and the University of Utah created the Yellowstone Volcano Observatory (YVO), a partnership for long-term monitoring of the geological processes of the Yellowstone Plateau volcanic field, for disseminating information concerning the potential hazards of this geologically active region. [94]

The Greater Yellowstone Fires of 1988-Questions and Answers" (PDF). Greater Yellowstone Coordinating Committee. February 2022. a b "U.S. Statutes at Large, Vol. 17, Chap. 24, pp. 32–33. "An Act to set apart a certain Tract of Land lying near the Headwaters of the Yellowstone River as a public Park." [S. 392]". Archived from the original on June 24, 2013.

Subscribe to Receive JJC Proposed Rules Email Notifications

Information about the Yellowstone Volcano Observatory". Yellowstone Volcano Observatory. U.S. Geological Survey. February 2, 2007. Archived from the original on May 14, 2008 . Retrieved March 12, 2007. Notable Changes in Thermal Activity at Norris Geyser Basin Provide Opportunity to Study Hydrothermal System". Yellowstone Volcano Observatory. U.S. Geological Survey. March 16, 2005. Archived from the original on January 18, 2012 . Retrieved March 12, 2007. Report of the Superintendent of the Yellowstone National Park to the Secretary of the Interior for the year 1872". Archived from the original on January 15, 2017. Haines, Aubrey L. (2000). "The Fur Trade Era (1818–42)". Yellowstone National Park: Its Exploration and Establishment. U.S. Department of the Interior. Archived from the original on October 15, 2006 . Retrieved November 15, 2006. Annual Park Ranking Report for Recreation Visits in: 2022". National Park Service . Retrieved July 23, 2023.