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Map showing general chemical quality of surface water in the Kaiparowits coal-basin area, Utah Map showing general chemical quality of surface water in the Kaiparowits coal-basin area, Utah
This is one of a series of maps that describe the geology and related natural resources in the Kaiparowits coal-basin area, Utah Published sources of water-quality data used in the preparation of this map included Iorns, Hembree, Phoenix, and Oakland (1964), Goode (1966, 1969), U.S. Bureau of Land Management (1976), and U.S. Geological Survey (1961-75). Sources of unpublished data...
Map showing high-purity silica sand of Middle Ordovician age in the Midwestern states Map showing high-purity silica sand of Middle Ordovician age in the Midwestern states
Certain quartz sands of Middle Ordovician age in the Midwestern States are well known for their purity and are exploited for a wide variety of industrial uses. The principal Middle Ordovician formations containing high-purity sands are the St. Peter Sandstone which crops out extensively from Minnesota to Arkansas; the Everton Formation principally of Arkansas; and the Oil Creek, McLish...