Vancouver, B.C. – December 20, 2018: San Marco Resources Inc. (SMN: TSX-V) (“San Marco” or the “Company”) announces that diamond drilling has been completed at its 100% owned Chunibas copper/silver project, located in Sonora State, Mexico (the “Project”). San Marco and a wholly-owned subsidiary of Antofagasta plc (“Antofagasta”) have entered into an earn-in agreement (the “agreement”) to jointly explore and drill test several copper-silver rich mineralized targets mapped on surface. Antofagasta has funded all exploration during the current Phase I exploration program.