nov 10, 1929 - Arthur Holmes discovered mantle
convection currents. Holmes
proposed the theory of convection
currents in Earth. He observed when
things heated they become less
dense and rose, as they go up the
cool and become more dense
and sink. he believed this
pressure could crack and move
the continents.
I used article 3.
Added to timeline:
History Of Plate Tectonics.
Date:
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