United States Geological Survey YearbookThe Survey, 1987 - Geology |
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Page 3
... operation on Lake Superior . Air guns in four arrays marked by the orange floats are towed be- hind the ship about 30 feet be- neath the surface . Powerful blasts ( equivalent to the deto- nation of about 30 pounds of dynamite ) of ...
... operation on Lake Superior . Air guns in four arrays marked by the orange floats are towed be- hind the ship about 30 feet be- neath the surface . Powerful blasts ( equivalent to the deto- nation of about 30 pounds of dynamite ) of ...
Page 7
... operations , largely because of outstanding cooperation and coordination of efforts among many government and academic institutions in both the United States and Canada . Much work remains for the future , however , in order to complete ...
... operations , largely because of outstanding cooperation and coordination of efforts among many government and academic institutions in both the United States and Canada . Much work remains for the future , however , in order to complete ...
Page 18
... operational , is expected to be one of the most powerful tools for ground- water protection programs ( fig . 7 ) . The USGS cooperative program will continue to provide the science , data man- agement concepts , and predictive tools for ...
... operational , is expected to be one of the most powerful tools for ground- water protection programs ( fig . 7 ) . The USGS cooperative program will continue to provide the science , data man- agement concepts , and predictive tools for ...
Page 27
... age at which all argon produced by radioactive decay of potassium remains trapped in the mineral and is not Figure 4. Panorama of the plati- num mining operation in. Significant Accomplishments of Research Programs : 1987 27.
... age at which all argon produced by radioactive decay of potassium remains trapped in the mineral and is not Figure 4. Panorama of the plati- num mining operation in. Significant Accomplishments of Research Programs : 1987 27.
Page 28
... operation in the Stillwater Complex , Montana . Right foreground - mine office ; center foreground - tailings pond ; lower left - mill and con- centrator ; three portals that pro- vide access to the ore deposit are hidden by trees in ...
... operation in the Stillwater Complex , Montana . Right foreground - mine office ; center foreground - tailings pond ; lower left - mill and con- centrator ; three portals that pro- vide access to the ore deposit are hidden by trees in ...
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activities Administration agencies Alaska aquifer basin Bureau Calcasieu River cartographic CD ROM Chief City City of w coal color Commission concentrations Connecticut contamination cooperative Coordination County crater data base Department of Public deposits drilling Earth Science earthquakes energy Enewetak Environmental facilities Federal feet Figure fiscal year 1987 geographic information systems geologic map Geologist geophysical gram graphic ground water hazards hydrologic Hydrologist investigations Lake Nyos land located lower Calcasieu River major Management ment miles million mineral resources mining models National Center National Mapping Division Office organic compounds Park percent Planning processes production projects Province quadrangle Regional Reston rocks samples San Andreas fault San Joaquin River scientific scientists sedimentary sediments seismic selenium Service South Stop studies surface Survey's techniques tion topographic Transportation U.S. Geological Survey United users USGS Vernalis Volcano Water District Water Resources water-use zone