United States Geological Survey YearbookThe Survey, 1985 - Geology |
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Page 17
... Historically , mining interest in the midcontinent region has centered on the near - surface sedimentary rocks ( lime- stones and dolomites ) , which contain deposits of lead and zinc and are called 1000 5000 SD 46 N MN WI 100 ° W 17.
... Historically , mining interest in the midcontinent region has centered on the near - surface sedimentary rocks ( lime- stones and dolomites ) , which contain deposits of lead and zinc and are called 1000 5000 SD 46 N MN WI 100 ° W 17.
Page 18
... sedimentary rocks . New resource possibilities for these overlying rocks have been indicated by recent fluid - inclusion studies and by the consideration of plate tectonic theories . The examination of trapped bubbles of fluid in the ...
... sedimentary rocks . New resource possibilities for these overlying rocks have been indicated by recent fluid - inclusion studies and by the consideration of plate tectonic theories . The examination of trapped bubbles of fluid in the ...
Page 19
... sediments and offshore beneath the continental shelf . The goal of these field and laboratory studies is to identify and outline areas that are favorable for the occurrence of base- metal deposits . Descriptions of examples of each type ...
... sediments and offshore beneath the continental shelf . The goal of these field and laboratory studies is to identify and outline areas that are favorable for the occurrence of base- metal deposits . Descriptions of examples of each type ...
Page 20
... sediments , and analysis of measurements from geophys- ical surveys and satellite imagery . By fiscal year 1984 , 175,000 square miles had been assessed under AMRAP , and 80,000 square miles under CUSMAP . Present plans call for ...
... sediments , and analysis of measurements from geophys- ical surveys and satellite imagery . By fiscal year 1984 , 175,000 square miles had been assessed under AMRAP , and 80,000 square miles under CUSMAP . Present plans call for ...
Page 28
... sedimentary and volcanic rocks currently account for the majority of gold produced in the United States . Total U.S. reserves ( identified resources that are currently economic to produce ) are about 20 million troy ounces . These ...
... sedimentary and volcanic rocks currently account for the majority of gold produced in the United States . Total U.S. reserves ( identified resources that are currently economic to produce ) are about 20 million troy ounces . These ...
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activities Alaska aquifer areas Assistant Bacillus cereus basins Bureau California cartographic cartographic data base City coal Columbia Glacier Commission contaminants Control Cooperative Denver Department of Public digital cartographic data digital data earthquake energy Environmental eruption Federal agencies Federal Bldg feet fiscal year 1984 flow fluid inclusions geochemical geographic geographic information systems Geologist geophysical ground water ground-water hazards High Plains hydrologic ical image map information systems investigations irrigation Lake land Landsat lava located Loki Patera major Management Mauna Loa million mineral deposits mineral resources models monitoring National Center National Mapping Division Office offshore Parkfield Parkfield earthquake Planning potential production quadrangle radar Regional remote sensing River rocks San Andreas fault scientific sediment Service sources square miles STOP studies sulfur surface Survey scientists Survey's techniques tion topographic maps trends U.S. Geological Survey Volcano Water Conservation District Water District zone