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Devils Tower

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Devils Tower is a massive geological landmark located in northeastern Wyoming. It is a laccolithic butte, which is a dome-shaped mass of igneous rock. The monument sits within the Bear Lodge Ranger District of the Black Hills. It rises high above the Belle Fourche River near the towns of Hulett and Sundance. This site holds great importance as the first United States national monument. President Theodore Roosevelt established the monument on September 24, 1906.

DevilsTowerInfoSignDeer
DevilsTowerInfoSignDeer

The formation of the tower began approximately 40.5 million years ago. During this time, magma rose through the Earth's crust. This molten rock intruded into existing layers of sedimentary rock. The surrounding landscape is mostly composed of sedimentary layers like the Spearfish Formation. This formation contains dark red sandstone and maroon siltstone. The red color comes from the oxidation of iron minerals. Above this lies the white gypsum of the Gypsum Springs Formation. The Sundance Formation sits above that layer. The rising of the Rocky Mountains and Black Hills occurred during the Paleocene Epoch, between 56 and 66 million years ago.

As the magma cooled, it turned into a specific igneous rock called phonolite porphyry. This rock is light- to dark-gray or greenish-gray in color. It contains visible white crystals of feldspar. A fascinating process occurred as the magma cooled underground. The cooling caused the rock to contract into vertical columns. Most of these columns are hexagonal, meaning they have six sides. However, some columns have four, five, or seven sides. These columns are very tall and wide. Geologists Nelson Horatio Darton and C.C. O'Harra theorized in 1907 that the tower is an eroded remnant of a laccolith.

The name "Devils Tower" is the result of a historical misunderstanding. In 1875, Colonel Richard Irving Dodge led an expedition through the area. His interpreter reportedly misinterpreted a Native American name. The interpreter believed the name meant "Bad God's Tower." This was eventually shortened to "Devils Tower." Because of this, many Indigenous groups have different names for the site. The Lakota and Kiowa call it Mato Tipila, or Bear Lodge. Other names include Bear's Tipi, Tree Rock, and Great Gray Horn.

2003-08-16 Devils Tower advisory
2003-08-16 Devils Tower advisory

Native American cultures have deep spiritual connections to this monolith. Many geomyths describe the tower as a place of protection. In Kiowa and Lakota stories, girls escaped giant bears by praying to the Great Spirit. The Great Spirit made the rock rise toward the heavens. The bears left deep claw marks on the sides while trying to climb. In Cheyenne versions, the marks also come from bears attempting to reach the girls. Another Northern Cheyenne legend involves a buffalo head appearing at the summit. This story is significant because the Northern Cheyenne held sacred buffalo heads in their camps.

Human interaction with the tower has changed over many decades. The first documented nonindigenous visitors were part of a 1859 expedition. The first successful ascent occurred on July 4, 1893. Two local ranchers, William Rogers and Willard Ripley, completed this climb. They used a ladder made of wooden pegs driven into rock cracks. Modern climbing techniques were first used in 1937 by Fritz Wiessner. In 1941, George Hopkins performed a famous publicity stunt by parachuting onto the butte. He became stranded for six days due to bad weather and lost equipment. A rescue team eventually brought him down safely.

Today, the tower continues to change through the process of erosion. Rain and snow fall on the columns constantly. Water enters the cracks and freezes, which expands the gaps. This process can cause entire columns of rock to break off. These fallen rocks form piles called scree at the base. The presence of scree suggests the tower was much wider in the past. While the tower is being eroded, it remains a massive and iconic feature of the Wyoming landscape. Hundreds of climbers visit each summer to scale its sheer walls.

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File:2003-08-16 Devils Tower advisory.jpg
2003-08-16 Devils Tower advisory.jpg
File:DevilsTowerInfoSignDeer.jpg
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