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Wr.N <br /> ;U'AA <br /> "J <br /> SAN JLOAN <br /> VOLGAMC RELP <br /> Al—Min <br /> UT CO <br /> AZ NM37* <br /> r <br /> SAN JUA N <br /> & BASIN <br /> 411 KII I Ill 11 W: <br /> IbT <br /> Figure 1: The upper figure shows the location of the La Plata district and main roadways in the <br /> vicinity of the district(taken from Cappa, 1998); the black rectang'e outlines the region covered <br /> in Figure 2 below. The lower figure is a generalized regional map showing the main geographic <br /> and physiographic features near the La Plata Mountains. Thin solid lines indicate the general <br /> trends of Oligocene-Miocene mafic dikes swarms in southwestern Co'orado- The Hogback <br /> mDnochne marks the boundary between the San Juan basin and Four Comer platform_ <br /> Figure1-California Mining District <br /> May Day Idaho Mine Complex <br /> M-1981-185 <br /> January 19, 2017 <br /> Page I - 19 - <br />