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Album caption: Polished hand specimen of a gabbroic gneiss near Bruces Eddy (loc. 418, pl. 4). The light-colored minerals are quartz and plagioclase, the dark ones hornblende and biotite. Clearwater County, Idaho. c. 1950. Published as figure 62 in U.S. Geological Survey. Professional paper 344-A. 1962.


    map background search result map search result map Polished hand specimen of a gabbroic gneiss near Bruces Eddy.  Clearwater County, Idaho. 1950. WMR 330 - Elk River Deposit. Clearwater County, Idaho. 1945. Polished hand specimen of a gabbroic gneiss near Bruces Eddy.  Clearwater County, Idaho. 1950. WMR 330 - Elk River Deposit. Clearwater County, Idaho. 1945.