Devil's Tower Geology
http://www.nps.gov/deto/naturescience/geologicformations.htm

National Park Service (NPS)


This site from the National Park Service briefly addresses the geology of Devil's Tower. The evolution of various theories on the formation of the tower are discussed. A slide show of the emplacement of the tower is also available.

This resource is referenced here:
Subject: Geoscience:Geology, Geology:Igneous and Metamorphic Petrology
Resource Type: Scientific Resources:Overview/Reference Work
Topics: Time/Earth History