Timing the Formation While the process of seafloor spreading that defines the ridge is ongoing, the initial formation of the divergent boundary in the Atlantic began approximately 140 to 150 million years ago. The Mid-Atlantic Ridge represents one of the planet's most significant geological features, a continuous underwater mountain range that stretches like a scar along the floor of the Atlantic Ocean.
When Was Mid Atlantic Ridge Discovered
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. The Mid-Atlantic Ridge is the physical manifestation of this divergence, a boundary where new oceanic crust is created as magma rises from the mantle and solidifies.
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. Understanding when the Mid-Atlantic Ridge formed requires looking back hundreds of millions of years to a time when the continents we recognize today were joined together in a single supercontinent.
When Was Mid Atlantic Ridge Discovered
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.
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