Geological Survey Bulletin, Ausgabe 1497U.S. Department of the Interior, Geological Survey; Washington, D.C., 1949 - 303 Seiten |
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adit allochthonous anomalous amounts argillite average beds Big Lost River Big Wood River black shale breccia calcite caved adit Challis Volcanics clastic Copper Basin Formation country rock Creek stock deposits detected Devonian dikes district drainage basins Eagle Bird East Fork exposed fault zone galena Glide Mountain plate gneiss grams silver Gulch Homestake Hyndman Idaho intrusive complex Iron-oxide-stained Lake Creek limestone Little Fall Creek Little Wood River metamorphic metasedimentary Milligen Formation mineralized rock molybdenum Muldoon Creek Number outcrop oz silver Paleozoic percent lead percent zinc Phi Kappa Pioneer Mountains Pioneer window pits prospect pyrite quartz monzonite quartz vein quartzite ridge rock samples containing shear zone Silurian silver per metric Stoped Stream sediment stream-sediment samples structure Summit Creek tactite thick thrust fault tons Tr Tr trace amounts trace gold Trail Creek U.S. Geological Survey Umpleby unit upper Wildhorse Creek Wood River Formation ZZZZ ZZZZZ ន ន