Bulletin, Ausgaben 956-957

abstract abundant adit altitude anomalies argillite assignor bed veins Belt rocks biotite borehole Bull Lake Bull Lake fault Cabinet Mountains Calkins Callahan Creek Cambrian chalcopyrite chlorite Claims allowed Clark Fork contain deposits dike district drilling Dry Creek stock earth east electrical exploration feldspar galena Geological Survey Geophys geophysical glacial glacier gold grains gravel gravimeter gravity Grouse Mountain hornblende Idaho inches indicated Jour Kootenai River Libby Creek Libby quadrangle magnetite magnetometer means measurements metadiorite method miles minerals Mines Montana Okla orthoclase oxidized percent petroleum places plagioclase Prichard formation prospecting pyrite pyrrhotite quartz monzonite quartz veins quartzite radioactive Ravalli formation sandstone Savage Lake sea level seismic seismograph sericite shale shear zones sills silt silver Snowshoe fault sphalerite strike Striped Peak structure sulfides surface terrace thickness tion Tulsa U. S. Geol U. S. patent velocity vertical wall rock Wallace formation waves