In July 2017, a Facebook page claimed that the Devils Tower was actually the remnants of a giant tree. Rain and ice continue to erode the sedimentary rocks surrounding the base of the Devils Tower and over a period more of the Devils Tower will be exposed. The Devils Tower did not visibly protrude out of the ground till the sedimentary rocks surrounding the landscape eroded away. As the magma cooled further the width of the columns shrank and cracks occurred at the angles of 120 degrees, forming compact 6-sided columns. As the magma cooled, hexagonal columns formed each about six feet in the diameter. The igneous rock that forms the Devils Tower is porphyritic phonolite that was intruded about 40.5 million years ago. A laccolith is a mass of igneous rock intruded through beds of sedimentary rock and never reaching the surface, but instead leaves a rounded bump in the sedimentary layers above. O’Hara theorized that the Devils Tower must be the eroded remnant of a laccolith. In 1907 geologists Nelson Horatio Darton and C.C. In the late 19th century, geologists Carpenter and Russell studied the Devils Tower and concluded that it was formed by the intrusion of igneous material but were unsure about how the process took place. The Native American names for the monolith include “Bear’s House” or “Bear’s Lodge”. That is how the name “Devils Tower” came into being. He recorded the name as ‘Devils Tower’ because his interpreter misinterpreted, the native name to mean “Bad God’s Tower”. ![]() Upon reaching the site Colonel Dodge was mesmerised by the rock formation describing it as “ one of the most remarkable peaks in this or any country”. They were there to confirm claims of gold, first initiated by General George Armstrong Custer. In 1875, Colonel Richard Irving Dodge led an expedition for geologist Walter P. The Devils Tower was the first US national monument established by President Theodore Roosevelt on the 24th of September 1906. ![]() The height of this monument is 867 feet from base to summit with its summit rising to a height ofĥ,112 feet above sea level. The Devils Tower, also known as the Bear Lodge Butte, is a laccolithic butte composed mainly of igneous rock and is located in the Bear Lodge Ranger District of the Black Hills in Crook County, North-eastern Wyoming, in the United States of America.
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