United States Geological Survey YearbookThe Survey, 1987 - Geology |
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Page viii
... surface- and ground - water re- sources , and applying our extensive knowl- edge of cartography and remote sensing to develop innovative approaches to the solution of many land- and resource- management concerns . Conducting the ...
... surface- and ground - water re- sources , and applying our extensive knowl- edge of cartography and remote sensing to develop innovative approaches to the solution of many land- and resource- management concerns . Conducting the ...
Page 1
... surface , an area approximately equal to the combined land areas of the States of Wisconsin and Mich- igan . Because the waters of the lakes con- ceal the bedrock beneath them from direct , conventional geologic mapping and study , the ...
... surface , an area approximately equal to the combined land areas of the States of Wisconsin and Mich- igan . Because the waters of the lakes con- ceal the bedrock beneath them from direct , conventional geologic mapping and study , the ...
Page 2
... surface generate strong sound waves , which propagate to the lake bottom and are transmitted deep into and through the Earth's crust . Portions of these waves are reflected from contacts of rock bodies that have contrasting acoustic ...
... surface generate strong sound waves , which propagate to the lake bottom and are transmitted deep into and through the Earth's crust . Portions of these waves are reflected from contacts of rock bodies that have contrasting acoustic ...
Page 3
... surface and transmit the signals to recording equipment onboard . B , The seismic- reflection surveying system in operation on Lake Superior . Air guns in four arrays marked by the orange floats are towed be- hind the ship about 30 feet ...
... surface and transmit the signals to recording equipment onboard . B , The seismic- reflection surveying system in operation on Lake Superior . Air guns in four arrays marked by the orange floats are towed be- hind the ship about 30 feet ...
Page 6
... surface Bend in line 369 12 KILOMETERS ( approximate ) 15 18 -21 24 27 -30 33 -36 39 Moho 42 45 Figure 4. A portion of seismic reflection section F ( see fig . 1 for location ) that crosses the Mid - Continent Rift . The heavy black ...
... surface Bend in line 369 12 KILOMETERS ( approximate ) 15 18 -21 24 27 -30 33 -36 39 Moho 42 45 Figure 4. A portion of seismic reflection section F ( see fig . 1 for location ) that crosses the Mid - Continent Rift . The heavy black ...
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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