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Regions of the sea floor on either side of the Mid-Atlantic Ridge are found to be about 19 km wide and to contain magnetic rocks which have a magnetic field mostly aligned with the current direction of the Earth's magnetic field, while rocks farther out from the ridge have fields which point in the opposite direction. If the oldest rocks in the 19 km wide strip are about 750,000 years old, what has been the average speed of the sea floor expansion during this time? m/s

Regions of the sea floor on either side of the Mid-Atlantic Ridge are found to be about 19 km wide and to contain magnetic rocks which have a magnetic field mostly aligned with the current direction of the Earth's magnetic field, while rocks farther out from the ridge have fields which point in the opposite direction. If the oldest rocks in the 19 km wide strip are about 750,000 years old, what has been the average speed of the sea floor expansion during this time? m/s

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Regions of the sea floor on either side of the Mid-Atlantic Ridge are found to be about 19 km wide and to contain magnetic rocks which have a magnetic field mostly aligned with the current direction of the Earth's magnetic field, while rocks farther out from the ridge have fields which point in the opposite direction. If the oldest rocks in the 19 km wide strip are about 750,000 years old, what has been the average speed of the sea floor expansion during this time? m/s

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