Abstract

Velocity determinations at wells and refraction shooting in the area indicate abnormally high velocities in Utah.The following conclusions are reached: (1) these high velocities are related to hardening due to incipient metamorphism after deposition; (2) this condition has an adverse effect on the quality of reflections; (3) it interferes with interpretation of refraction data; (4) it may be an index of unfavorable condition for accumulation of oil or gas.

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