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Abstract

As a consequence of the discussion and exercises of the preceding lesson, we are now in a position to solve a numerical problem, based on corrected field data, of a two-layer refraction profile in which the interface is dipping along the line of the profile.

The solution should be studied not only for its intrinsic value as a step toward learning the interpretation techniques for this and for more complicated refraction problems, but also because this type of solution is often used to study low-velocity layers for the purpose of making corrections for other types of seismic data (particularly reflection travel-times). It should be apparent that the disposition of the interface between the low-velocity layer and the beds beneath can often be detailed by short reversed refraction profiles of the type we are discussing here.

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