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The Seven Days' battles were demoralizing for the South.
Magma Chamber
An underground pool of liquid rock found beneath the surface of the Earth.
Asteroid Impact
The collision of an asteroid with another body, such as the Earth, often causing significant geological and environmental changes.
Sinkhole
A closed, circular depression, usually in a karst area, resulting from the collapse of an underlying cave.
Welded Tuff
A type of rock formed from volcanic ash that has been sufficiently heated to weld together.
Q29: The popular leader of American forces in
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