The Breakup of Pangaea To answer the question of when the Mid-Atlantic Ridge formed, one must first understand the demise of Pangaea. The exact timing varies slightly depending on the segment of the ridge, as the process was not instantaneous across the entire length of the Atlantic.
When Did Mid Atlantic Ridge Start Forming Amid Pangaea's Breakup
5 centimeters per year, a process that has been steadily widening the Atlantic Ocean for millions of years. Oceanic Feature Age Relative to Ridge Implied Formation Time Ridge Axis Youngest Present Day First Magnetic Anomaly ~5-10 million years old Late Miocene Mid-Sea Sediment Layer ~100 million years old Cretaceous Continental Shelves ~150+ million years old Jurassic Ongoing Creation and Activity The formation of the Mid-Atlantic Ridge is not a singular event locked in the past; it is a continuous process that defines the current geography of the Atlantic.
By analyzing the alternating patterns of magnetic minerals locked in the basaltic rock, scientists can see a symmetrical record of Earth's magnetic reversals flanking the ridge. This supercontinent, which existed during the late Paleozoic and early Mesozoic eras, began to fracture around 175 million years ago during the Jurassic period.
When Did Mid Atlantic Ridge Start Forming Amid Pangaea's Breakup
The ridge is not a static monument but a dynamic boundary where the Earth's tectonic plates are perpetually moving apart, a process that began in the Jurassic period and continues to shape our world. As the North American and Eurasian plates drifted to the north and west, and the South American and African plates moved in opposite directions, the space between them needed to be filled.
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