The correlation of high seismicity with the Mid-Atlantic Ridge. This map was
produced in 1937. Note the refinement of earthquake zones on this map as
compared to the map in image cgs02176. In: Proceedings of the American
Philosophical Society, Vol. 79, No. 1, Symposium on the Exploration of the Ocean
Bottom Arranged by the American Geophysical Union (April 21, 1938), pp. 97-108.
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