Figure 2. Sedimentary facies that indicate deposition from river-derived hyperpycnal flows. A. Meter-thick intervals of flat-laminated fine sandstone. B- Intra-bed grain-size variation from fine to medium sandstone. C. Intra-bed alternations of ripple lamination – plane parallel lamination – ripple lamination. D. Intra-bed alternations of plane parallel lamination – structureless – plane parallel lamination.