Miller, Marli Bryant. Seeing Time: Geology of the American West as seen through the National Parklands (100-106), 2009.
“Part 2: Yellowstone- The First National Park” Windows Into Wonderland. http://www.windowsintowonderland.org/history/army&nps/page1b.htm
“Yellowstone Digital Slide File: Thermal feature images” National Park Service: US Department of the Interior. http://www.nps.gov/features/yell/slidefile/thermalfeatures/index.htm
“Hot Springs and How they Work” National Park Service: US Department of the Interior. http://www.nps.gov/yell/naturescience/hotspring.htm
“Hydrothermal Features and How they Work” National Park Service: US Department of the Interior. http://www.nps.gov/yell/naturescience/geothermal.htm
“Caldera” National Park Service: US Department of the Interior. http://www.nps.gov/yell/naturescience/caldera.htm
“Hot Spot Theories” National Park Service: US Department of the Interior. http://www.nps.gov/yell/naturescience/hotspottheory.htm
