Groundwater flowing within a karst cave; Eramosa Karst Conservation Area, Hamilton, Ontario, Canada. Photo credit: James Roy, Environment and Climate Change CanadaThe 2012 Great Lakes Water Quality Agreement includes a commitment under the Groundwater Annex to "publish an…
Staining of rock face due to groundwater seepage along Superior shoreline: Pictured Rocks National Lakeshore near Munising, Michigan. Photo credit: Craig Blacklock,U.S. National Park Service.Staining of rock face due to groundwater seepage along Superior shoreline: Pictured…