Roller's Data
Roller interpreted the data in 1965. Here are the main
points that he came up with...
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Crustal thickness of 43 km at Chinle and 40 km at Hanksville
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Some of the first arrivals were due to shallow, slow velocity,
sediments,
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Upper Crustal Velocity of 6.2 km/s
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Mid Crustal boundary at 26 km (PiP reflected phase)
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Lower Crustal velocity of 6.8 km/s
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Upper mantle velocity of 7.8 km/s
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