This geological map of Yellowstone National Park was based on work by William Henry Holmes in 1878 as part of Ferdinand Vandeveer Hayden’s United States Geological and Geographical Survey of the ...

Slip and slide. Laser-mapping of the Yellowstone area uncovered over 1,000 landslides (outlined in yellow), most within the national park. This topographical map (red denotes higher elevations ...

Henry Wood Elliott was a dedicated conservationist and explorer who, in 1871, helped create the first bathymetric map of Yellowstone Lake. Unlike many of his contemporaries, however, he declined to ...

While maps already show Yellowstone deposits across the US from previous big eruptions 640,000, 1.3million, and 2.1million years ago, they don't provide information on the original ash thickness ...