Abstract
THE necessity of a careful examination of the various geological formations in the field, and a review by a practical palæontologist of the various districts that have from year to year been surveyed by the different geologists of this and other surveys, has been long felt. Such a work, indeed, was imperatively necessary, before a con sistent and comprehensive classification of the formations could be established. This duty was assigned to Dr. C. A. White, the palaeontologist of this survey, and he took the field at the beginning of the past season and con tinued his labours until its close. The special duty with which he was charged was to pursue such lines of travel as would enable him to make critical examination of the geological formations in succession as they are exposed to view on both sides of the Rocky Mountain chain, and also on both sides of the Uinta chain; to collect and study the fossils of these formations in such detail as to settle, as far as possible, the questions of the natural and proper vertical limits of the formations, their geographical range, their correlation with each other, and to define the palæontological characteristics of each.
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Geological Work of the U.S. Survey under Prof. Hayden during the Summer of 1877 . Nature 17, 129–131 (1877). https://doi.org/10.1038/017129b0
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DOI: https://doi.org/10.1038/017129b0