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 Breakup of Pangaea To answer the question of when the Mid-Atlantic Ridge formed, one must first understand the demise of Pangaea.
How the Mid Atlantic Ridge Took Shape Through the Breakup of Pangaea
The ridge grows at an average rate of about 2. This supercontinent, which existed during the late Paleozoic and early Mesozoic eras, began to fracture around 175 million years ago during the Jurassic period.
This places the genesis of the ridge squarely in the Early Cretaceous epoch, though the rift that led to its creation started to open in the preceding Jurassic. 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.
How the Mid Atlantic Ridge Forms Over Time Through Geological Eras
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. 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.
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