This project was funded by the Canada-Ontario Northern Ontario Development Agreement (NODA) 1992-1997 and the Geological Survey of Canada. R. Paulen of the Quaternary Sciences Institute, University of Waterloo, carried out fieldwork in 1995 as part of a M.Sc. thesis project. Geologists and staff from the following companies and organizations are thanked for allowing access to their properties, or for sharing confidential geological information: Royal Oak Mines Inc., Falconbridge Ltd., Kinross Gold Corp., Pentland Firth Ventures Ltd., the Timmins Airport, and Ontario Hydro. Staff of the Timmins Resident Geologists Office (MNDM) provided advice, and logistical and technical support. Z. Madon (OGS) prepared the digital data files for the bedrock geology base map.