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Map showing drainage areas, Hartford South quadrangle, Connecticut Map showing drainage areas, Hartford South quadrangle, Connecticut

Map shows stream systems and drainage areas that contribute streamflow to selected sites on streams. Drainage areas shown have not been adjusted for the manmade changes in the natural regimens such as storm sewers, diversion dams, canals, and tunnels.

Map showing high-purity quartzite in California, Nevada, Utah, Idaho, and Montana Map showing high-purity quartzite in California, Nevada, Utah, Idaho, and Montana

Unusually pure quartzite of Ordovician age crops out in hundreds of places from Owens River, California to southwestern Montana. It constitutes a single lithologic type that is called the Kinnikinic Quartzite in central Idaho, the Swan Peak Quartzite in southeastern Idaho and adjacent parts of Utah, and the Eureka Quartizite in western Utah, Nevada, and southern California.
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