734 



STRUCTURAL GEOLOGY OF NORTH AMERICA 



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Tweto, Ogden (1947), Pre-Cambrian and Laramide geology of the Frazer area. 

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Vanderwilt, J. W., et al. (1948), Guide to the geology of central Colorado, 

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Van Houten, F. B. (1955), Volcanic-rich middle and Upper Eocene sedimen- 

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