Crustal structure in the eastern Colorado Plateaus Provence from seismic-refraction measurements

Abstract A reversed seismic-refraction profile was recorded in the Colorado Plateaus province from Hanksville, Utah, to Chinle, Arizona. The velocity of P g is 6.2 km/sec, and the velocity of P n is 7.8 km/sec. Waves identified as reflections indicate that an intermediate layer in the crust has a velocity of approximately 6.8 km/sec. Thickness of the crust is 43 km at Chinle and 40 km at Hanksville. The P n velocity in the Colorado Plateaus province is the same as that in the Basin and Range province, but is significantly lower than P n velocity in the High Plains of Colorado.

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