United States Geological Survey YearbookThe Survey, 1987 - Geology |
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Page 3
... feet be- neath the surface . Powerful blasts ( equivalent to the deto- nation of about 30 pounds of dynamite ) of compressed air are released from the guns to gen- erate sound waves . These sound waves , under suitable conditions , can ...
... feet be- neath the surface . Powerful blasts ( equivalent to the deto- nation of about 30 pounds of dynamite ) of compressed air are released from the guns to gen- erate sound waves . These sound waves , under suitable conditions , can ...
Page 6
... feet in the southwest . Fortunately for our purposes , these rocks have almost no magnetic prop- erties and are therefore " transparent " to the aeromagnetic technique . The strong magnetic character of rocks in Lake Huron ( fig . 3 ) ...
... feet in the southwest . Fortunately for our purposes , these rocks have almost no magnetic prop- erties and are therefore " transparent " to the aeromagnetic technique . The strong magnetic character of rocks in Lake Huron ( fig . 3 ) ...
Page 14
... feet 9. Depth to bedrock : 0-10 feet 10. Depth to bedrock : 50 - foot intervals 11. Unconsolidated materials 12. Sand and gravel deposits 13. Unified soil classification of substratum 14. Soil saturated with water within 3 feet of the ...
... feet 9. Depth to bedrock : 0-10 feet 10. Depth to bedrock : 50 - foot intervals 11. Unconsolidated materials 12. Sand and gravel deposits 13. Unified soil classification of substratum 14. Soil saturated with water within 3 feet of the ...
Page 19
... FEET ELEVATION IN FEET IN. Introduction A geographic information system ( GIS ) is a computer hardware and software system designed to collect , manage , ana- lyze , and display spatially referenced data . In the simplest sense , a GIS ...
... FEET ELEVATION IN FEET IN. Introduction A geographic information system ( GIS ) is a computer hardware and software system designed to collect , manage , ana- lyze , and display spatially referenced data . In the simplest sense , a GIS ...
Page 21
Geological Survey (U.S.). LEGEND : POTHOLE VOLUME IN FEET ELEVATION IN FEET IN ACRE - FEET Significant Accomplishments of Research Programs : 1987. The San Mateo County Project , on the San Francisco Peninsula , California , com- bines ...
Geological Survey (U.S.). LEGEND : POTHOLE VOLUME IN FEET ELEVATION IN FEET IN ACRE - FEET Significant Accomplishments of Research Programs : 1987. The San Mateo County Project , on the San Francisco Peninsula , California , com- bines ...
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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