Some principles of sediment transport mechanics and interpretational techniques were applied to study of a composite set of crossbedding in a Pleistocene (Wisconsin) fluvioglacial sand at Littleton, Mass. Current strength of the paleo-flow stream regime was estimated from median grain size. Sorting and dispersion of sizes within the deposit were used to estimate flow conditions associated with formation of bedding structures. Dune forms were used to estimate stream depth. Estimates of velocity and depth of stream flow were found to be essential to interpretation and formed the basis for extrapolation of many other parameters meaningful to environmental reconstruction and quantitative studies of sediment transport.