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Karst Features of the Madison aquifer

Choose a feature on the left to read about it and see photos:

Disappearing Streams

Dye injected into a stream enters a swallow hole in the Madison Limestone. The fluorescein dye from this injection was detected in five wells located as much as 2 miles northeast of the injection site.

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URL: http://water.usgs.gov/ogw/karst/aquifers/madison/features
Page Contact Information: USGS Office of Groundwater
Page Last Modified: Monday, 30-Jan-2012 16:39:46 EST