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What is the output voltage, in Figure 18-3 at a frequency of 20 kHz?
Banded Iron Formations
Layers of iron-rich minerals alternated with silica or chert, deposited in marine environments over 2.5 billion years ago and are important iron ore sources.
Metal-rich Fluids
Liquids emanating from the Earth's crust, usually heated by magma, that are high in dissolved metals, often found in volcanic and hydrothermal areas.
Magma
A molten rock material beneath the earth's surface, which can solidify to form igneous rocks.
Deep Canyon
A profound and narrow valley with steep sides, carved by a river, glacier, or geological processes over time.
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