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Contents of 13.2 How do we know ... that mountains have roots?

13.2 How do we know ... that mountains have roots?

• The Pratt and Airy hypotheses both successfully explain surface elevation. Although it is not possible for both to be independently correct for all situations, combinations of each are satisfactory in most, though not all, cases.
• Seismic data demonstrate the presence of thick roots of crust projecting downward into the mantle beneath mountains as predicted by Airy's model.