As a follow-up to a previous blog, the city has posted Dr. Cal DeWitt's presentation on their website here.
The slide below is my favorite showing the various layers of bedrock deposits in Dane County (top left is north). The two darkest layers are the thickest areas of the Eau Claire formation which comprise the best aquitard separating our upper and lower aquifers. As you can see, much of the county does not benefit from this layer of shale.
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