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Green Lake Co., Wisconsin, USA

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Green Lake County is underlain by Cambrian and Ordovician sedimentary rocks which are usually blanketed by glacial drift - till, outwash and loess. Ordovician carbonates are quarried, and the quarries can yield interesting specimens of calcite, quartz, dolomite, fluorite, pyrite and marcasite. Some quarries contain "cold water" agate in the dolostone, the colorful form of which is known locally as "Nolte agates". Precambrian rhyolite outcrops in a quarry near Utley. The glacial deposits can on occasion yield interesting specimens including "drift" copper.

Mineral List

Mineral list contains entries from the region specified including sub-localities

17 entries listed. 13 valid minerals.

Localities in this Region

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Dott, Robert H. & J.W. Attig, (2004) Roadside Geology of Wisconsin, Mountain Press, 345 p.

External Links

Wisconsin Mineral index - Wisconsin Geological and Natural History Survey

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