Pre-Carboniferous strata in the Grand Canyon of the Colorado, Arizona

Charles Doolittle Walcott

doi:10.2475/ajs.s3-26.156.437

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Walcott, C. D. (1883). Pre-Carboniferous strata in the Grand Canyon of the Colorado, Arizona. American Journal of Science, s3-26(156), 437–442. https://doi.org/10.2475/ajs.s3-26.156.437

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Pre-Carboniferous Strata in the Grand Canyon of the Colorado, Arizona