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Seafloor Spreading and Plate Tectonics (Part 2)
02:39

Seafloor Spreading and Plate Tectonics (Part 2)

Geophysicist and geologist Tanya Atwater talks about the Deep Sea Drilling Project and the confirmation of magnetic reversals that provided strong evidence of seafloor spreading and plate tectonics.

Plate Tectonics and Earthquake Distribution
02:30

Plate Tectonics and Earthquake Distribution

Geophysicist and geologist Tanya Atwater talks about the correlation between plate boundaries and earthquake distribution.

Plate Tectonics and Heat
01:16

Plate Tectonics and Heat

Geophysicist and geologist Tanya Atwater talks about plate tectonics as a mechanism by which Earth's interior sheds the tremendous heat that builds up as a result of radioactive decay.

Pangaea
00:47

Pangaea

Geophysicist and geologist Tanya Atwater talks about the super continent Pangaea, thought to have broken up into the continents as we know them today beginning about 200 million years ago.

Alfred Wegener and Continental Drift
01:02

Alfred Wegener and Continental Drift

Geophysicist and geologist Tanya Atwater discusses the role of Alfred Wegener in bringing together a variety of evidence in support of the theory of continental drift.

Wegener's Mistakes
01:01

Wegener's Mistakes

Geophysicist and geologist Tanya Atwater talks about mistakes made by Alfred Wegener in formulating his theory of continental drift, some of which created doubt and skepticism among fellow geologists.

Early Evidence of Continental Drift
00:28

Early Evidence of Continental Drift

Geophysicist and geologist Tanya Atwater points to the jig-saw puzzle fit of Africa and South America as the most obvious evidence supporting the theory of continental drift.

Seafloor Spreading: Harry Hess
00:47

Seafloor Spreading: Harry Hess

Geophysicist and geologist Tanya Atwater talks about seafloor spreading, an idea first articulated by Harry Hess that many consider to be the linchpin of plate tectonics.

Seafloor Spreading and Plate Tectonics (Part 1)
00:42

Seafloor Spreading and Plate Tectonics (Part 1)

Geophysicist and geologist Tanya Atwater talks about the role of seafloor spreading and spreading centers in the plate tectonics process.

Seafloor Spreading: Vine and Matthews
02:14

Seafloor Spreading: Vine and Matthews

Geophysicist and geologist Tanya Atwater talks about work done by Fred Vine and Drummond Matthews that ultimately provided proof of seafloor spreading by tracking the patterns of magnetic striping on the ocean floor.