• A bull elk bugles in Yellowstone National Park

    Yellowstone

    National Park ID,MT,WY

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  • Craig Pass Closed for the Season; Mammoth to Norris, Expect 30-minute Delays

    The road linking West Thumb and Old Faithful is closed for the season—traffic should detour through West Thumb, Lake, and Canyon. More »

Inside Yellowstone - Sheepeater Cliff

 
More Information

Sheepeater Cliff Photos - Earths Extremophiles Website
http://www.lpi.usra.edu/education/fieldtrips/2007/photos/sheepeater_cliff/index.htm

Basalt - Wikipedia
http://en.wikipedia.org/wiki/Basalt

Basalt - About.com
http://geology.about.com/od/rocks/ig/igrockindex/rocpicbasalt.htm

Columnar Basalt Photos - Centripetal Notion
http://centripetalnotion.com/2007/07/21/20:50:54/


Did You Know?

Seventh Cavalry Ensignia Pin.

Prior to the establishment of the National Park Service, the U.S. Army protected Yellowstone between 1886 and 1918. Fort Yellowstone was established at Mammoth Hot Springs for that purpose.