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Science 23 August 1968:
Vol. 161. no. 3843, pp. 781 - 784
DOI: 10.1126/science.161.3843.781
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Articles

Gulf of California: A Result of Ocean-Floor Spreading and Transform Faulting

Roger L. Larson 1, H. W. Menard 2, and S. M. Smith 3

1 Scripps Institution of Oceanography, La Jolla, California 92037
2 Institute of Marine Resources, Scripps Institution of Oceanography
3 Scripps Institution of Oceanography

Ocean-floor spreading tore southern Baja California from mainland Mexico 4 million years ago and has subsequently rafted it 260 kilometers to the northwest along the Tamayo Fracture Zone. Magnetic-anomaly profiles indicate spreading at the mouth of the gulf at 3.0 centimeters per year and a rise-crest offset of 75 kilometers inside the gulf across the Tamayo Fracture Zone.


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