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The significance of buried valleys to groundwater systems in the Oak Ridges Moraine region, Ontario: extent, architecture,
sedimentary facies and origin of valley settings in the ORM region
; Sharpe, D R; Russell, H A J; Pugin, A. Geological Survey of
Canada, Open File 6980, 2013, 87 pages, https://doi.org/10.4095/292673