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