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Publication authorized by the Director, U.S. Geological Survey.


The ideal objective in classification of depositional environments is division of the entire depositional realm into useful discrete and consistently named categories. In practice, terms commonly used reflect place, medium, or process of deposition. Intergrading of environments makes necessary the recognition of environmental complexes, designated in terms of dominant aspect. Symposium papers are assigned to categories in an existing classification and in variant classifications for nonmarine and mixed categories. Marine classification needs extensive additional study.

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