chapter_21_le modified

chapter_21_le modified - Geologic Resources Physical...

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Steve Kadel, Glendale Community College Geologic Resources Physical Geology 11/e, Chapter 21
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Geologic Resources and Earth’s Systems Geologic resources - valuable materials of geologic origin that can be extracted from the Earth Many geologic resources originate in the hydrosphere Petroleum and coal come from organisms that lived and died in water Halite (salt) and other evaporite minerals come from dry lake beds Weathering interactions between geosphere , atmosphere and hydrosphere produce metal oxide ores Humans ( biosphere ) interact directly with the geosphere, hydrosphere, and atmosphere when extracting and utilizing geologic resources Groundwater ( hydrosphere ) is a renewable geologic resource If it can’t be grown , it must be mined
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Types of Geologic Resources Geologic resources are grouped into three major categories: Energy resources - petroleum (oil and natural gas), coal, uranium, geothermal resources Metals - iron, copper, aluminum, lead, zinc, gold, silver, platinum Non-metallic resources - sand and gravel, limestone, building stone, salt, sulfur, gems, gypsum, phosphates, groundwater, etc.
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Types of Resources Renewable – agricultural resources, can be grown or re-grown Non-renewable (depletable) – any resource extracted from the earth Non-depletable – cannot be used up by man, solar, wind, hydro or water power, tidal, geothermal
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chapter_21_le modified - Geologic Resources Physical...

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