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Dodge Co., Wisconsin, USA

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 43° 25' 36'' North , 88° 32' 4'' West (est.)
Margin of Error:~0km

Dodge County is underlain primarily by Paleozoic sedimentary rocks - primarily sandstone and dolostone. Ordovician rocks dominate, although part of the Niagara escarpment, marking the contact with harder Silurian dolostones, dominates the northeastern edge of the County. There are a few outcrops of Precambrian quartzite cut by pegmatites in the southern portion, which are quarried,and have yielded interesting minerals. A discontinuous zone at the top of the Ordovician Maquoketa Shale is called the Neda Ironstone, an oolitic hematite-rich zone with a wealth of rare (though very fine-grained) minerals identified by XRD. These deposits were mined in the IronRridge District, but mines are now abandoned and serve as a major bat hibernarium.

Mineral List

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

43 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.


Frederick, George (1993) When Iron was King in Dodge County, Wisconsin: Mayville Historical Society

Dott, R.H. & J. W. Attig (2004) Roadside Geology of Wisconsin: Mountain Press, 346 p.

External Links

Wisconsin Mineral index - Wisconsin Geological and Natural History Survey

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