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UW-River Falls geology professor Bill Cordua and UW-RF student Amy Nachbor created a guidebook exploring the unique geology of Nugget Lake County Park. Submitted photo
UW-River Falls geology professor Bill Cordua and UW-RF student Amy Nachbor created a guidebook exploring the unique geology of Nugget Lake County Park. Submitted photo

Guidebook helps visitors appreciate Nugget Lake

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outdoors Ellsworth, 54011
Ellsworth Wisconsin 126 S. Chestnut St. 54011

PLUM CITY - A new guidebook offers a glimpse into the unique geology of Nugget Lake County Park in Pierce County, along the edge of the last continental glacier that covered much of the state.

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Developed by Nugget Lake County Park staff, University of Wisconsin-River Falls geology professor William Cordua and student Amy Nachbor, the guidebook highlights the geological features of the park. It's the first guidebook that outlines walking and driving tours showcasing some of the park's very unusual geological features and land formations.

Nachbor -- who lives in Maple Grove, Minn., and graduated in May with a bachelor's of science degree in geology -- worked on the guidebook and tested the walking and driving tours as part of her senior thesis requirements. The guidebook and map are for sale for $10 at the park office.

"We've sold quite a few this summer," said Park Superintendent Scott Schoepp, who assisted with creating the guidebook. "It's been a good seller by word-of-mouth. We are hearing people say, 'My friend got this guide and I'd like one too.'"

Cordua has been studying the park and its geology for the past 30 years.

"The park's been there even before people realized that it has an interesting geology," he said. "It has always attracted geologists from other parts of the country, and in recent years we held our regional geological conference there."

Cordua has also identified a feature he calls the "Rock Elm Disturbance" that has been found be an asteroid impact site from 450 million years ago. The meteorite -- thought to be the size of Lambeau Field -- created unusual strata formations and an impact structure that is four miles in diameter.

Cordua also has worked with geography Prof. Charles Rader and Pierce County Partners in Tourism to create a "Geological Tour of Pierce County, Wisconsin" CD that highlights the Rock Elm Disturbance and other geological features of the county. It is available from www.travelpiercecounty.com

The park has intrigued many visitors for decades since diamonds were discovered in the park, said Cordua. Named Nugget Lake after the gold mining that occurred in the area in the 1800s, a lake was created when a dam was constructed on Plum Creek in 1972 for erosion control.

"Geologists are the crime scene investigators of planet Earth," writes Nachbor and Cordua in the introduction. "By looking at the rocks and soils around us, geologists begin to put together a picture of what the world we live in looked like thousands if not millions of years ago."

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