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NEWMONT <br />GOLDCORP.. <br />in Section 3 below'. Details of the horizontal and vertical extents of mining are available in <br />previous amendments. The horizontal and vertical extents of the Schist Island Mine area, <br />including backfill sequencing as part of the VLF2 Phase 3 construction, are shown in Appendix 1. <br />Details of the reclamation plan are provided in Exhibit E. <br />2.2 Geology <br />The geology of the area affected by Amendment 13 has been described in previous submittals. <br />A summary of the geology in the North Cresson Mine area and Squaw Gulch is provided below. <br />Exhibit C-7 shows the geology of the District. <br />Mineralization in the northwest portion of the District falls into the North Cresson Mine area and <br />includes Globe Hill, Schist Island, and the SGOSA. The geology is dominated by a large, <br />northwest -trending, elongate, Precambrian ridge of schist that is surrounded by diatremal breccia. <br />Both the schist and breccia are oxidized on the surface and display moderate to strong potassic <br />alteration and weak argillic alteration. This area has been intruded by scattered and discontinuous <br />lamprophyre and phonolitic dikes as well as a small plug of porphyritic phonolite. The dominant <br />structural trends in this area display a north-northwest and northeast -trending fabric. <br />The Globe Hill area is underlain by breccia and phonolitic country rock that was intruded by late - <br />stage hydrothermal breccia pipes. These breccia pipes hosted most of the gold mineralization in <br />the area and are characterized by strong argillic alteration as well as the presence of sulfate <br />(gypsum and anhydrite), carbonate (calcite and rhodochrosite), and quartz veining. The breccia <br />pipe bodies are generally less than 500 feet in diameter and occur at the intersection of northeast - <br />and north -northwest -trending structural zones. <br />The Squaw Gulch area general lithology is composed of four rock types. The predominant <br />bedrock unit is the Cripple Creek lapilli breccia, which generally consists of a massive, <br />structureless, matrix -supported breccia that is poorly sorted, typical of diatremal crater fill breccia. <br />Clasts are sub -angular to sub -rounded and primarily composed of various phonolite units with <br />occasional Precambrian fragments. The breccia commonly shows varying degrees of <br />hydrothermal alteration. The second and third rock types are the plagioclase phonolite and the <br />' Mining activities and sequencing will not change from previous amendments, except for the sequence of backfilling <br />the Schist Island Pit area with the construction of VLF2 Phase 3. Details of the VLF2 Phase 3 sequencing are <br />provided in the Valley Leach Facility 2 Phase 3 Detailed Design Report provided in Appendix 1. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Amendment 13 <br />4 <br />Exhibit D <br />