Bulletin, Issue 864

Alaska Alaska Railroad assays average Basin Bear Gulch bedrock bench Bulletin camps coal Colorado Creek copper country rock Cripple Creek deposits Discovery claim downstream dredge east Fairbanks farther feet of gravel feet wide Flat Creek foot of bedrock Ganes Creek Geological Survey glacial gold lodes gold placers granitic greenstone ground head headwater Hidden Creek Iditarod district inches Innoko River intrusive issued separately Kuskokwim region Kuskokwim River limestone Long Creek McGrath miles mineral mouth Nixon Fork district nugget occur open-cut operations Ophir Ophir district Otter Creek ounce overburden pay streak placer gold placer mining Poorman Poorman Creek present production prospecting quartz monzonite R. H. Sargent reported Ruby district Ruby-Kuskokwim region S. R. Capps sandstone Seward Peninsula shaft side silver slate slopes Spruce stream Survey Bull Susitna Takotna Talkeetna Mountains thickness tributaries U. S. Geol upper upstream valley floor Willow Creek Yukon