Tag: plate tectonics

Plate Tectonic Theory—History of How it was Discovered (Educational)

CHAPTERS (click blue links to go to that time code in video. 0:00 Introduction 0:36 1600s–1800s 1:11 Bathymetry reveals ridges 1:30 Wegner’s Continental Drift 2:11 Radioactive decay 2:50 Nuclear bomb testing 3:13 Marie Tharpe/ocean ridges 3:46 Harry Hess/seafloor spreading 4:02 Seafloor magnetic stripes 4:17 Hot-spot formation 4:35 Three Boundary types 4:52 Mantle convection/gravity The theory […]