Figure F61. Close-up of thin, well-sorted, cross-laminated sandstone (35-36 cm) between burrowed muddy sandstone below and laminated massive mudstone above. The thin sandstone is interpreted to be the top of the underlying muddy sandstone that was reworked into a train of current ripples by a muddy turbidity current (Unit 4: interval 210-1276A-29R-1, 29-39 cm).