Who determined that S waves were unable to survive deep passage through the Earth's interior?
a. Alfred Wegener
b. Richard Oldham
c. Inge Lehmann
d. Francis Bacon
ANS: B
Richard Oldham reasoned that a dense fluid within the Earth absorbed the S waves. He expanded his
theory to include the prediction of shadow zones where the S waves did not occur due to that dense
liquid. Information can be found in the section The Study of Earthquakes Provides Evidence of
Layering.
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