Tectonics
Videos
Tectonics are the processes that result in the structure and properties of Earth's crust and its evolution through time. The field of planetary tectonics extends the concept to other planets and moons
San Andreas transform fault on the Carrizo Plain
The Tectonic Network of Earth. Legend: Brown: Terrane (microplate) boundaries in the continents and Mobile Belts, Cyan: Terranes of the Oceanic Plates, Blue: Oceanic transform faults; Red and orange: Fault zones in the Continental and Mountain belt domain; Purple: Main subduction zones and suture zones; Green: Continental margins
Seafloor spreading
Videos
Seafloor spreading, or seafloor spread, is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
Spreading at a mid-ocean ridge