A new model shows how the planet's surface evolved over the past 100 million years, from the shifting of tectonic plates to the movement of sediments.
New"unprecedented" animations of the Earth show how the planet's surface has shifted and changed over the past 100 million years.
The animations show the movements of tectonic plates, the large rafts of crust that bump up against each other to form mountain ranges and pull apart to form ocean basins. When these plates dive into the mantle, or Earth's middle layer, at subduction zones they give rise to planet-shaping volcanoes and earthquakes.
"What we bring with this new model," Salles wrote in an email to Live Science,"is a way to evaluate how this surface has changed shaped by its interactions with the atmosphere, the hydrosphere, the tectonic and mantle dynamics."The model begins 100 million years ago in the midst of the breakup of the supercontinent Pangaea, which started to occur around 200 million years ago.
Putting together all of these different pressures on the evolution of Earth, from the movements of the plates to the flow of water to the slow changes in the mantle, provides a new way to ask questions about everything from the regulation of the climate to the ways the circulation of the atmosphere affect erosion on land. —Plate tectonics are 3.
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