All Maps
Explore all USGS Maps and refine your search by type, topic, year, location, and advanced search.
Filter Total Items: 9586
Composite geochemical map of anomalous copper and molybdenum distribution in the Tanacross Quadrangle, Alaska Composite geochemical map of anomalous copper and molybdenum distribution in the Tanacross Quadrangle, Alaska
This geochemical map delineates drainage basins in which either anomalous copper, molybdenum, or both copper and molybdenum were detected in at least one of four sample media: (A) the oxide residue (the oxalic-acid-leachable fraction) of the stream sediment, (B) the minus-80-mesh stream sediment, (C) the ash of streambank sod (mixed organic and inorganic material) collected beneath the...
Composite geochemical map of anomalous lead and zinc distribution in the Tanacross Quadrangle, Alaska Composite geochemical map of anomalous lead and zinc distribution in the Tanacross Quadrangle, Alaska
This geochemical map shows drainage basins in which either anomalous lead, zinc, or both lead and zinc values were detected in at least one of four sample media: (A) the oxide residue (the oxalic-acid-leachable fraction) of the stream sediment, (B) the minus-80-mesh stream sediment, (C) the ash of streambank sod (mixed organic and inorganic material) collected beneath the water level...