Diapiric salt structures are concentrated in the Gulf of Mexico and adjacent areas of greater than normal sedimentary thickness, and their times of growth appear to be related to periods of greater than normal sedimentary accumulation. The author suggests that salt ridges or anticlines, as well as lesser structures which have a definite regional strike alinement, may have been positioned by regional strike flexures or strike-fault zones, and that the heights of the salt spines above the ridges or anticlines are probably related to the thickness of sediments above the rising mass of salt.

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