I hate it when National Geographic Magazine contains a map with interesting information not explained on the map or within the accompanying article. Such in the recent April issue, vis a vis earthquakes. The map indicates larger mid-plate areas of higher occurance and risk for more major earthquakes include much of central and western Australia and surrounding the St Lawrence River Valley and smaller areas in west-central Africa, northeastern Brazil and a few other places, including of course the New Madrid area. Nothing in the article explains the geologic whys for these areas being comparatively more severe earthquake prone. Fortunately a couple of professional geologists' answers to other Yahoo Answers queries detail about the reasons for New Madrid (thank you) but what about the others, especially Austraila's and the St-Lawrence?
2006-07-11
08:41:16
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4 answers
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asked by
Hank
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