![Elkhorn Mountains / Helena National Forest / Placer mining / Butte / Montana / Mining / Geology of the Rocky Mountains / Gold mining in Alaska / Gold mining in Colorado / Geography of the United States / Montana / Economic geology Elkhorn Mountains / Helena National Forest / Placer mining / Butte / Montana / Mining / Geology of the Rocky Mountains / Gold mining in Alaska / Gold mining in Colorado / Geography of the United States / Montana / Economic geology](https://www.pdfsearch.io/img/4746cb6ff8fc0467c38e0c546ef82f1b.jpg) Date: 2005-07-21 12:19:36Elkhorn Mountains Helena National Forest Placer mining Butte Montana Mining Geology of the Rocky Mountains Gold mining in Alaska Gold mining in Colorado Geography of the United States Montana Economic geology | | The Boulder River Watershed Study, Jefferson County, Montana By Stanley E. Church, David A. Nimick, Susan E. Finger, and J. Michael O’Neill Chapter B ofAdd to Reading ListSource URL: pubs.usgs.govDownload Document from Source Website File Size: 1,65 MBShare Document on Facebook
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