| | Journal (article/letter/editorial) | commonly altered to other manganese oxides such as pyrolusite, braunite, and hausmannite, and pseudomorphs...deposits associated with pyrolusite, goethlte, and an array of generally earthy iron and manganese oxides...Fort mine near Woodstock, Shenandoah County; the Vesuvius mine, Augusta County; the Midvale mine, Rockbridge...consitituent of manganese ores of the Cartersville district, Bartow County, Georgia (Cook 1978). This fine...braunite, and brilliant 5-cm pseudomorphs of pyrolusite after calcite. This 9 x 11-cm group was acquired | | | Report (issue) | Energy, Mines and Resources Canada E:nergie, Mines et Ressourees Canada Canada THE ENERGY OF OUR RESOURCES...OUR IDEAS COVER Left: Amethyst - Thunder Bay, Ontario. Specimen measures 4.5 cm across the base. National...50263. GSC 204977-1 Right: Gypsum (selenite) - Red River Floodway, Winnipeg, Manitoba. Specimen measures...no. 17206. GSC 204971-1 Geological Survey of Canada Miscellaneous Report 49 ROCKS AND MINERALS FOR... © Minister of Supply and Services Canada 1991 Available in Canada through authorized bookstore agents | | | Journal (volume) | centers of the state; exhibits of minerals, rocks, mine models, scientific lurgy, etc. ; a service...bright. Production of some of the metallies — iron, lead, duction also declined. On the other hand...the wise utilization of California's mineral and rock resources. The pays tific investment in geologic...the state. No square mile should be overlooked. No rock exposure should lie unobserved. CALIFORNIA JOURNAL...zones, parks, defense, etc., so that mineral and rock deposits which are becoming increasingly useful |
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Roberts pit, Steep Rock Iron Mine, Freeborn Township, Rainy River District, Ontario, Canada