Devil's Tower in Wyoming is an ancient intrusive igneous body, formed about 40.5 million years ago. Its gray to greenish-gray rock is phonolite porphyry—not basalt. The exact shape of the intrusion remains debated, with proposals including a volcanic plug or stock, laccolith, and maar-diatreme origin.
The tower's present summit was below ground when it formed. Long-term uplift and erosion stripped back the overlying and surrounding rock, exposing the buried igneous core. The video describes this as catastrophic erosion and notes other 'devil'-named sites, but the cited evidence does not establish a single catastrophic event.
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Devils Tower - Wikipediaen.wikipedia.orgDevils Tower ... For other uses, see Devil's Tower (disambiguation). Devils Tower (also known as Matȟó Thípila or Bear Lodge) is a laccolithic butte, composed of ...
Devils Tower N.M. | GeologyVirtualTripsgeologyvirtualtrips.comDevils Tower, rising 867 ft. from its base, is a 50 million-year-old igneous intrusion composed of a gray to greenish gray rock with large crystals of white ...
Natural Wonders: Basalt Columns - Explorersweb »explorersweb.comIn North America, there's Devil Tower, Devil's Postpile in California, and Sheepeater Hills in Yellowstone National Park. Other examples are ...
Devils Tower - Volcano World - Oregon State Universityvolcano.oregonstate.eduDevils Tower is a steep-sided igneous body and, possibly, an erosional remnant of a volcanic neck. It is made of magma that solidified at a shallow level.
Devils Tower, Mateo Tepe - IUGS-Geoheritage.orgiugs-geoheritage.orgAn iconic and prominent igneous rock feature with the World´s largest example of columnar jointing. Mateo Tepe (Devils Tower) is an iconic geological feature ...
Geomythology. Devils tower: born from hell? - EGU Blogsblogs.egu.euThe Devils Tower derives from the Cenozoic igneous activity of the Black Hills, which underwent a strong uplift due to lithosphere scale folding ...
Devils Tower & Black Hillsgeowyo.comDevils Tower is one of many intrusive igneous bodies that comprise the northern Black Hills Eocene alkaline magmatic province.
Geology and Physiography of Devil's Towerserc.carleton.eduGeologists agree that Devil's Tower formed from molten rock forced upwards from deep within the earth. Devil's Tower was not a volcano, but was ...
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