These waterfalls are in Amnicon State Park in far northwestern Wisconsin. It’s not far from Pattison State Park that also has waterfalls as shown in a previous post.
The falls in both parks are along the Douglas Fault line that runs from Ashland, Wisconsin to Minnesota’s Twin Cities. The fault, last active 500 million years ago, passes through both Pattison and Amnicon State Parks. There were many earthquakes around the fault. “Over thousands of years the force of the earthquakes created the ridge that runs through Amnicon Falls State Park and Pattison State Park.” *
* Who knew? Fault line connects Pattison and Amnicon state parks, Superior Telegram, March 13, 2009