How did scientists figure out how old the rocks in the Mid-Atlantic Ridge are?

Scientists determined the age of rocks in the Mid-Atlantic Ridge using radiometric dating techniques, specifically measuring the decay of isotopes like uranium to lead in volcanic rocks. They collected samples from various locations along the ridge, which revealed a pattern of younger rocks near the ridge crest and older rocks further away. Additionally, the age of the ocean floor was correlated with the magnetic reversals recorded in the rocks, providing a timeline of seafloor spreading. This combined approach allowed scientists to accurately estimate the age of the rocks and understand the geological processes at play.