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      <marc:subfield code="a">Precambrian geology, Winiskisis Channel area, "Ring of Fire" region, Ontario, northern sheet / </marc:subfield>
      <marc:subfield code="c">digital drafting by R.T. Metsaranta, M.G. Houlé and S. Evers ; cartographic production by R. Corcoran ; editing by M.A. Rutka and R.M. Easton.</marc:subfield>
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      <marc:subfield code="a">"This map is produced as part of the Targeted Geoscience Initiative (TGI) of the Geological Survey of Canada and is a contribution of the Lands and Minerals Sector of Natural Resources Canada."</marc:subfield>
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      <marc:subfield code="a">"Regional bedrock geological mapping and compilation of surface exposures and diamond-drill core was carried out between 2010 and 2014 in the 'Ring of Fire' (RoF) region as part of the Ontario Geological Survey's core bedrock geology mapping program and the Targeted Geoscience Initiative of the Geological Survey of Canada. The RoF region has been subdivided in 1:100 000 scale geological maps (northern, central, southern sheets). This geological map summarizes the field observations and the compiled information acquired during the field campaigns in the Winiskisis area"--Description, supplied by the publisher.</marc:subfield>
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