Why Did Sir Edward Bullard's 1960's Fit of the 900

question 66

Multiple Choice

Why did Sir Edward Bullard's 1960's fit of the 900 m bathymetric contour show some areas of overlap between South America and Africa ?

• A) The work was actually done by a graduate student and Bullard never checked the details before he published it.
• B) Massive erosion has modified the entire coastlines since 200 Ma so it is a wonder they still fit so well.
• C) Large volumes of sediment have accumulated in the deltas and fans from the Congo, Amazon, Parana, and Rio de Plata rivers to outbuild the continental shelves and slopes.
• D) Inaccurate bathymetry was all that was available to him prior to our modern multibeam sonar techniques.

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