By any measure, the Andes mountains are very, very big.
up to 7 kilometers in height andBut how did the range grow to this gigantic scale? Plate tectonics – the movement of great slabs of Earth's crust across the planet –Though the concept is simple in theory, tracking the speed of tectonic movements across timescales shorter than 10 to 15 million years in duration is tricky for geologists.to get a more detailed look at the movement of the South American plate that formed the Andes.
Then there's relative plate movement , the movement of plates in relation to each other. This is calculated using a broader range of clues, including magnetization data embedded in the ocean floor signifying rock movement, and offers higher resolution data than APM. "My hope is that such methods will be used to refine historic models of tectonic plates and thereby improve the chance of reconstructing geological phenomena that remain unclear to us."
One possibility is convection currents in the mantle changed, shifting different densities of material around. It's also possible that a phenomenon called delamination was responsible, where significant parts of a plate sink lower into the mantle. Both events would've had knock-on effects that influenced the rate of the plate's movement.
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