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Scientists have gathered evidence of seafloor spreading at mid-ocean ridges through several key observations. One major piece is the symmetrical pattern of magnetic striping on either side of the ridges, which reflects reversals in Earth's magnetic field as new crust forms. Additionally, age dating of ocean floor sediments shows that the youngest rocks are located at the ridge, with older rocks found further away. Seismic data also indicate tectonic activity, confirming the movement of plates in these regions.

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Scientists have gathered evidence for plate spreading at mid-ocean ridges through various methods. One key piece of evidence is the measurement of magnetic striping on the ocean floor, where symmetrical patterns of magnetic minerals record the Earth's magnetic reversals as new crust forms and pushes older crust away. Additionally, seismic data and direct measurements of seafloor spreading rates using GPS technology confirm that the plates are indeed moving apart. Oceanic rock samples from the ridge also show that younger rocks are found closer to the ridge, supporting the idea of new material being created there.


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