United States Geological Survey YearbookThe Survey, 1987 - Forest reserves |
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Page 2
... FLOW SYSTEM. 42 ° The USGS and GSC jointly contracted the services of a commercial seismic sur- veying vessel that had been performing surveys off the Atlantic coast and brought it into the lakes . The ship acquired 850 miles of seismic ...
... FLOW SYSTEM. 42 ° The USGS and GSC jointly contracted the services of a commercial seismic sur- veying vessel that had been performing surveys off the Atlantic coast and brought it into the lakes . The ship acquired 850 miles of seismic ...
Page 5
... flows of basalt alternating with layers of sedimentary rocks . Study of these units on land indi- cates they were deposited in a feature known as the Mid - Continent Rift , a major continental - scale structure that curves in a broad ...
... flows of basalt alternating with layers of sedimentary rocks . Study of these units on land indi- cates they were deposited in a feature known as the Mid - Continent Rift , a major continental - scale structure that curves in a broad ...
Page 6
... flows Basalt flows and interlayered sedimentary rocks Crust of Archean Superior province Granitic and metavolcanic rock near surface Bend in line 369 12 KILOMETERS ( approximate ) 15 18 21 24 27 30 33 36 39 Moho -42 45 48 Figure 4. A ...
... flows Basalt flows and interlayered sedimentary rocks Crust of Archean Superior province Granitic and metavolcanic rock near surface Bend in line 369 12 KILOMETERS ( approximate ) 15 18 21 24 27 30 33 36 39 Moho -42 45 48 Figure 4. A ...
Page 7
... flows Basalt flows and interflow sedimentary rocks Archean crystalline rocks Fault and aeromagnetic investigations and other types of geophysical surveys . Geological and geophysical studies are also needed on land to correlate exposed ...
... flows Basalt flows and interflow sedimentary rocks Archean crystalline rocks Fault and aeromagnetic investigations and other types of geophysical surveys . Geological and geophysical studies are also needed on land to correlate exposed ...
Page 9
... ba- salt ridges within this lowland ( background ) remain undevel- oped . ( Photograph by Michael Bell , Connecticut Department of Environmental Protection . ) Minor flow system Direction of ground - water flow. Perspectives 9.
... ba- salt ridges within this lowland ( background ) remain undevel- oped . ( Photograph by Michael Bell , Connecticut Department of Environmental Protection . ) Minor flow system Direction of ground - water flow. Perspectives 9.
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activities Administration Alaska analysis aquifer areas Award basin Board Bureau Calcasieu River cartographic cartographic data Chief Hydrologist City City of w climate coal coastal Commission concentrations contamination cooperative Coordination County data base Denver Denver Federal Center Department of Public deposits Earth Science earthquake energy environment Environmental fiscal flow geographic information systems Geologic Division geologic map Geologist geophysical global change gram graphic ground water ground-water hazards hydrologic Hydrologist investigations Irrigation Lake Lake Nyos land located Management ment miles mineral resources National Center National Mapping Division natural Office organic Park percent Planning processes radon Regional Reston River rocks samples San Joaquin River scientific scientists sediment seismic selenium Service soils Stop streamflow studies surface tion Transportation U.S. Geological Survey United users USGS Valley Volcano Water Conservation District Water District water quality Water Resources water-quality wetlands zone