United States Geological Survey YearbookThe Survey, 1987 - Forest reserves |
From inside the book
Results 1-5 of 81
Page 6
... south- west is caused by increasing thickness of Paleozoic rocks and the consequent greater vertical distance between magnetic rocks and surveying instruments . The new aero- magnetic map ( fig . 3 ) clearly shows the boundaries of the ...
... south- west is caused by increasing thickness of Paleozoic rocks and the consequent greater vertical distance between magnetic rocks and surveying instruments . The new aero- magnetic map ( fig . 3 ) clearly shows the boundaries of the ...
Page 7
Geological Survey (U.S.). farther south are therefore interpreted to be similar bodies of 1.5 - b.y. - old granite . Along the northern shore of the lake , sedimentary rocks of the Huronian Super- group , more than 2.2 b.y. old , are ...
Geological Survey (U.S.). farther south are therefore interpreted to be similar bodies of 1.5 - b.y. - old granite . Along the northern shore of the lake , sedimentary rocks of the Huronian Super- group , more than 2.2 b.y. old , are ...
Page 20
... South Dakota . Future expansion of GIS capability is planned for Survey offices in Rolla , Mis- souri , and Anchorage , Alaska . This concen- tration of GIS technology and resources at key locations will make available a broader range ...
... South Dakota . Future expansion of GIS capability is planned for Survey offices in Rolla , Mis- souri , and Anchorage , Alaska . This concen- tration of GIS technology and resources at key locations will make available a broader range ...
Page 25
... South Dakota , Tennessee , and Wisconsin ( fig . 3 ) . The map is based primarily on rock types encountered by 1,500 drill holes that pene- trated the Precambrian basement . Good- quality aeromagnetic and gravity data , which generally ...
... South Dakota , Tennessee , and Wisconsin ( fig . 3 ) . The map is based primarily on rock types encountered by 1,500 drill holes that pene- trated the Precambrian basement . Good- quality aeromagnetic and gravity data , which generally ...
Page 28
... South Africa , which is the major supplier for the annual U.S. consumption of about 3.9 million ounces . Annual production from the mine is expected to be approximately 2.5 percent and 7.5 percent of the annual U.S. consumption of ...
... South Africa , which is the major supplier for the annual U.S. consumption of about 3.9 million ounces . Annual production from the mine is expected to be approximately 2.5 percent and 7.5 percent of the annual U.S. consumption of ...
Other editions - View all
Common terms and phrases
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