Mid-Atlantic Ridge: Age and Spreading Rates

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Science  27 Sep 1968:
Vol. 161, Issue 3848, pp. 1339-1342
DOI: 10.1126/science.161.3848.1339


Fission-track dating of basaltic glass from the Mid-Atlantic Ridge gives results which are consistent with the proposal of ocean-floor spreading. Solidification ages from ~10,000 years to ~300,000 years were measured. Correlation is also possible between the magnetic anomaly patterns over the Crest Mountains at 45°N and the geochronology of the outcropping basalts. Renewed volcanic activity well removed from the axis of the Mid-Atlantic Ridge has been demonstrated to have taken place in recent times.

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