Uranium deposits in the Powder River basin have been found during the past decade through the extensive use of the "roll-front" concept. Until now far more holes were drilled than were needed to complete successfully each profile across the various "roll-fronts" discovered. The recognition of 6 zones across the "roll-front" has enabled the geologist to effectively utilize his drilling so as to intersect the high-grade ore zone with fewer holes per profile. Consequently, time, effort, and money have been saved allowing the geologist more time to do more imaginative geologic thinking.

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