Abstract
A CENTURY and a quarter have passed since William Smith's "Strata Identified by Organized Fossils" (1816–19), with its figures of some 160 British fossils, made the long-delayed announcement of the discovery indicated in its title. The subsequent correlation of sedimentary rocks throughout the world has largely depended on the application of this discovery. Included microfossils now often enable the oil geologist to ascertain the horizon of the smallest sample from one of his borings; coal seams may be identified by fossil shells in the associated shales. In such ways has the study of fossils become of great practical help to mankind.
Index Fossils of North America
A New Work based on the complete revision and re-illustration of Grabau and Shimer's "North American Index Fossils". By Prof. Hervey W. Shimer and Prof. Robert R. Shrock. Pp. ix + 837 (303 plates). (New York: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1944.) 20 dollars.
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COX, L. Index Fossils of North America. Nature 154, 377–378 (1944). https://doi.org/10.1038/154377a0
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DOI: https://doi.org/10.1038/154377a0
