EXTECHIII: 3D Drillhole Data for Yellowknife Mining Camp GSC Open File 1583 This CD is the third in a series of digital databases compiled for the Yellowknife Greensotne Belt (See GSC Open File D3962 and GSC Open File 4339) and contains drill hole data for the Giant and Con Mine. Software that can read MS ACCESS databases is required to view the data. The GIS database contains data from over 60 thousand drill holes. Documentation detailing the data content is located in \Drillhole Release 2003.doc or \Drillhole Release 2003.html