Located in the northeastern corner of Wyoming, adjacent to the Black Hills of South Dakota, Devils Tower was proclaimed the country's first national monument in 1906 by President Theodore Roosevelt. It rises 867 feet high, and is made of ph… read more
Devils Tower, located in the northeastern corner of the state of Wyoming, was named the nation's first national monument by President Theodore Roosevelt in 1906. Perhaps most well-known for its "starring" role in the movie "Close Encounter… read more
Devils Tower is made of an igneous rock called phonolite porphyryl. Phonolite porphyryl is produced when cooling magma creates a byproduct of solid rock. This rock is a fine-grained igneous rock that has large feldspar crystals. The name ph… read more
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