Near Hulett in Crook County, Wyoming — The American West (Mountains)
How Did the Tower Form?
Devils Tower National Monument
Geologists agree the Tower is an igneous (hardened magma) intrusion, but have three different interpretations of the Tower’s original size and shape. Because of erosion, we may never know which interpretation is correct.
Three Possible Interpretations
The Tower is an irregularly shaped, igneous intrusion called a stock. It was formed when magma cooled and crystallized before reaching the earth’s surface.
The Tower is the remnant of a mushroom-shaped, igneous intrusion. As with the igneous stock, the magma solidified before reaching the earth’s surface.
The Tower is a cylinder-shaped igneous intrusion, part of the plumbing system that fed a volcano. The pipe feeding the volcano became plugged when the magma solidified underground.
Erected by National Park Service.
Location. 44° 35.393′ N, 104° 43.071′ Touch for map. Marker is located in Devils Tower National Monument; drive to the end of State Route 110 to the parking lot of the Devils Tower Visitor Center. Marker is in this post office area: Hulett WY 82720, United States of America.
Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies. Buried Tower (within shouting distance of this marker); People of the Land (about 400 feet away, measured in a direct line); Devils Tower ... the first National Monument (about 500 feet away); Friends, Family, and Fun (about 500 feet away); Life Above and Below Ground (approx. 0.6 miles away); What Are Those Big Concrete Pyramids Down by the River? (approx. 0.7 miles away); Devils Tower (approx. 2.6 miles away); a different marker also named Devils Tower (approx. 2.6 miles away). Touch for a list and map of all markers in Hulett.
More about this marker. Marker is along the southwest segment of the Tower Trail which circles Devils Tower. It is a 1/4 mile walk from the Visitor Center parking lot to the marker.
Also see . . . Devils Tower National Monument. Official National Park Service website. (Submitted on March 25, 2014.)
Categories. • Notable Places •
Credits. This page was last revised on June 16, 2016. This page originally submitted on March 25, 2014, by Duane Hall of Abilene, Texas. This page has been viewed 323 times since then and 15 times this year. Photos: 1, 2, 3, 4. submitted on March 25, 2014, by Duane Hall of Abilene, Texas.
Editor’s want-list for this marker. Photo of wide-view of marker and surroundings. • Can you help?