[Book Reviews]


    THE professor of geology in the University of Colorado has attempted to summarise a vast subject in a small volume with results that are likely to be of greater value to the geographer than the geologist. Beginning with an elementary but well-illustrated introduction to geology and mineralogy, the succeeding chapters deal with the geological history of Colorado; the metallic ores; fuels; structural materials; water supplies; soils and agriculture; climate and scenery. The treatment is generally too sketchy to have any detailed value. We learn, for example, that “the region is one of profound folding and faulting, and intrusion of igneous rocks. In many places it is evident that there were at least two periods of folding and two or more periods of faulting. The igneous intrusions are also of different ages.” This information cannot be said to be helpful.

    Geology and Natural Resources of Colorado.

    By Prof. Russell D. George. (University of Colorado Semicentennial Series, 1877–1927, Vol. 1.) Pp. xv + 228. (Boulder, Colo.: University of Colorado, 1927.) 2 dollars.

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    [Book Reviews]. Nature 123, 126 (1929). https://doi.org/10.1038/123126a0

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