Karstic interpretation of the Winnipeg aquifer (Manitoba, Canada)

At Winnipeg, the Upper Carbonate Aquifer displays high storage and transmissibility to 10–15 m beneath an erosional plain bevelling limestones and dolomites. It extends over more than 3400 km2 and is confined by overlying glacial tills and lake clays. It is interpreted as a preglacial limestone pavement karst preserved intact because glacial ice was frozen at the base and could neither scour nor infill it. It is an instance of glacial action …