What is Seafloor Spreading?

Who is Harry Hess?

What did he propose?

What does SONAR stand for?

What does it do?

What is Mid-Atlantic Ridge?

What did Hess discover?

What is the Hess Theory?

What does magma solidify to?

What does a Conveyor Belt do?

What did Hess suggest?

What explained this?

What happens when old oceanic crust get consumed in trenches?

What became the effect of this?

Who coined the term "Seafloor Spreading?"

What evidences supported The Hess Theory?

What evidences supported The Hess Theory?

What evidences supported The Hess Theory?

What is the natural tape-recording of the history of the reversals in the Earth's magnetic field?