While the idea of making an indirect determination of average sub-surface velocities by means of reflection profiles is far from new it is nevertheless considered worth reporting, inasmuch as it has been recently employed with fair success by the writer in areas beyond any wells that could be 'shot' for direct velocity measurements.Two examples of such surface velocity profiles are described--one located in the Means Field area of Andrews County, West Texas, and the other about 8 miles south of the Refugio Field, in Refugio County on the Texas Gulf Coast.

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