This layer represents the approximate thickness of unconsolidated materials as well as the approximate distribution of the Silurian bedrock in eastern Wisconsin. It a composite of 8 WGNHS published maps which range in having a scale of 1:100,000 to 1:1,000,000. This layer was developed in 2017 and updated in 2022, however the sources used to develop it were published in 1978, 1979, 1982, 2004, 2011, 2013, 2019 and 2021.This layer is part of the 2016-2018 NR 151 target performance standard rule revision. This layer was developed to assist the agricultural community in Wisconsin in maintain compliance with the NR 151 targeted performance standard. It is not recommended to be used for well installation, placement of utility lines, or any other construction or siting practice. This dataset was automatically cataloged from the creator's Open Data Portal. In some cases, publication year and bounding coordinates shown here may be incorrect. Additional download formats may be available on the author's website. Please check the 'More details at' link for additional information.
Although this data is being distributed by the American Geographical Society Library at the University of Wisconsin-Milwaukee Libraries, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.