Abstract

Braided stream deposits are found commonly where abundant sediment and high discharges were available during deposition. Braiding often results where incompetent streams form longitudinal bars by depositing coarse elements of bed load which trap finer elements. Transverse bars formed of better sorted sediment are tabular wedge-shaped bodies with foreset cross-strata and may be either the only depositional form or may be deposited on the downstream ends of longitudinal bars. Criteria are described as external geometric, that is, the shape, size, and relationships to surrounding deposits, or internal geometric, which include the grain orientation, grain-size distribution, and cross-stratification.

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