Assertion: geophysicist | /r/CapableOf | intreprete seismic line
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text: Thus, part of the job of a geophysicist intrepreting a seismic line is to first figure out what the polarity of their data is, and then decide if the peaks represent sands or represent shales - always bearing in mind that everything represented in the deep part of a seismic line may be completely the opposite of everything in the shallow part.