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What are the two forces that must balance out to maintain a state of isostasy?

User Marces Engel
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Answer:

Isostasy is the rising or settling of a portion of the Earth's lithosphere that occurs when weight is removed or added in order to maintain equilibrium between buoyancy forces that push the lithosphere upward, and gravity forces that pull the lithosphere downward.

Step-by-step explanation:

User MattLBeck
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