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Abstract

0.0 Humboldt, Arizona. Proceed south on Arizona Highway 69 toward Mayer. For aspects of geology not covered by this road log, refer to the one by O'Hara and Armstrong (1986) and the paper on geology between the Iron King and Copper Queen mines (Anderson, 1986b).

0.1 Deep roadcut in fanglomerate. View at 12:00 is of small hill underlain by metarhyolite tuff and meta-andesite. Dump on the left is at the Lone Pine massive sulfide deposit (Anderson and Blacet, 1972b; Webb, 1979). On the skyline in the distance at 12:00 and 1:00 are Big Bug Mesa and Little Mesa, capped by basalt of the Hickey Formation.

0.4 Reatta Pass Steakhouse on the left. Hills on the left and ridges on the right are capped by fanglomerate of the Hickey Formation that obscures the Early Proterozoic metavolcanic rocks in this area. Straight ahead on the near horizon are dumps of the Victor-Swindler and Huron-Montezuma prospects (fig. 50).

0.7 Roadcut on the right in meta-andesite or chloritized metasedimentary rocks.

0.9 At 9:00 is the ridge underlain by metarhyolite at the Bell Ranch prospect that we will visit this afternoon. Roadcuts ahead in meta-andesite and chloritic metasedimentary rocks.

0.7 Roadcut on the right in meta-andesite or chloritized metasedimentary rocks.

0.9 At 9:00 is the ridge underlain by metarhyolite at the Bell Ranch prospect that we will visit this afternoon. Roadcuts ahead in meta-andesite and chloritic metasedimentary rocks.

1.1 Dumps on the right at 9:00, along the base of Spud Mountain, are on the Silver

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