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Northern Minnesota has many waterfalls. This waterfall is in Gooseberry Falls State Park. Like Devil’s Kettle Falls, this waterfall is made of volcanic rock. The same geologic processes that formed Gooseberry Falls also formed Devil’s Kettle.

This is a piece of rhyolite. Rhyolite is the rock that makes Devil’s Kettle. Rhyolite is an igneous rock. Igneous rocks form when hot magma cools down and becomes solid. When scientists find igneous rocks somewhere, they know that volcanic activity happened there in the past.

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Making Connections


Would you want to visit Devil’s Kettle Falls? Why or why not?


Have you read any other books about scientists solving mysteries? What kind of scientists were they? What mysteries did they solve?


Minnesota has been shaped by volcanic activity and glaciers. Can you think of other places that have had volcanic activity or glaciers?

Teacher Resources

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