character: Alfred Wegener
topic: Theory of Continental Drift
grade: 10
subject: Geography
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character: Harry Hess
topic: Seafloor Spreading
grade: 10
subject: Geography
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character: J. Tuzo Wilson
topic: Transform Boundaries and Island Arcs
grade: 10
subject: Geography
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character: Arthur Holmes
topic: Convection Currents in the Earth's Mantle
grade: 10
subject: Geography
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