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The oldest visible rocks at the Devil's Tower monument are 225 to 195 million years old, from the Triassic period. During the Paleogene period, when the Rocky Mountains and the Black Hills were thrust up from the crust 65 million years ago, magma pushed up into the sedimentary rock layers, an intrusion of igneous material geologists agree created the formation.

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Q: How old is the Devil's Tower monument?
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Related questions

When was Devils Tower National Monument created?

Devils Tower National Monument was created on 1906-09-24.


When was Entrance Station - Devils Tower National Monument - created?

Entrance Station - Devils Tower National Monument - was created in 1941.


How wide is Devils Tower National Monument?

Devils Tower is 1000 feet wide


In which state is devils tower?

Devils Tower, the national monument, is located in northeastern Wyoming.


What was the nation's first national monument?

Devil's Tower National Monument www.nps.gov/deto


When was Devils Tower National Monument established?

1906


What state is Devils Tower National Monument in?

Wyoming


You can find Devils Tower National Monument at which location?

Wyoming


What is Devils Tower National Monument made of?

giant turds


What was the first declared US National Monument?

The Devils Tower which was established by Theodore Roosevelt in 1906.


What state is the devil's tower?

The Devils Tower is a US National Monument located in the Black Hills of Wyoming. It is just under a mile in height.


How tall is devils tower?

Devil's Tower rises to an astonishing height of 1267 ft. It doesn't look that big until you put your face against it.