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Information about karst “Karst” is the term used by geologists to describe areas where the bedrock, usually limestone or dolomite, has been (or has the potential to be) easily dissolved by surface water or groundwater. Karst landscapes may have deep bedrock fractures, caves, disappearing streams, springs, or sinkholes. These features can be isolated or occur in clusters, and may be open, covered, buried, or partially filled with soil, field stones, vegetation, water or other miscellaneous debris. Visit our photo gallery to see different types of karst features and their descriptions. Why is karst identification important? Karst features can act as direct conduits for pollutants to enter groundwater, wells, springs, and streams; some endangered species live exclusively in karst features or landscapes; bedrock in these landscapes, especially around sinkholes, may be weak and prone to collapse, raising safety and liability issues. Where can karst be found in Wisconsin? Much of Wisconsin´s karst is masked by thick layers of glacial deposits, particularly in the south-central and southeastern parts of the state. Bedrock areas in Wisconsin that have visible karst features include the Silurian dolomite in the eastern part of the state and the Sinnipee and Prairie du Chien dolomite located in the southern, eastern, and western parts of the state. Wisconsin counties that may contain noticeable karst features include Brown, Buffalo, Crawford, Dane, Dodge, Door, Grant, Green, Iowa, Jefferson, Kewaunee, La Crosse, Lafayette, Monroe, Pepin, Pierce, Richland, Saint Croix, Sauk, Trempealeau, Vernon, and Waukesha. (See map.) Help us inventory and map Wisconsin’s karst features! We are asking for your help. We would appreciate your using the Wisconsin Interagency Karst Feature Reporting Form to describe the karst features that you come across during your routine field activities. (The form is in Adobe® Acrobat® format; to view it, you will need the Adobe Acrobat Reader. If you don't have a copy of Reader, you may download one at no charge from Adobe.) The goals of this data-collection initiative are to protect Wisconsin’s groundwater resources and endangered species, provide useful information for various land-use planning activities, and facilitate construction, agriculture, and resource planning and management activities. If you know of existing karst features, or encounter them during future field work, please consider completing this form. Information from the completed forms will be maintained at the Wisconsin Geological and Natural History Survey (WGNHS) and is open to the public. If you have any questions about the karst form or Wisconsin’s karst features, please contact the WGNHS at 608/262.1705. Thank you for your time and consideration! The Wisconsin Interagency Karst Feature Reporting Form was developed by the Planning and Mapping Subcommittee of the Wisconsin Groundwater Coordinating Council (GCC). The GCC is an interagency group that is directed by law to assist state agencies in the coordination of nonregulatory programs and the exchange of information related to groundwater. See the GCC Web site for more information: <http://www.dnr.state.wi.us/org/water/dwg/GCC/>. |
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Updated 23 September 2003 |