The main objective of this work is to present results concerning the morphology and flow fields of amalgamating mobile bedforms developed by the Laboratory for Turbulence and Complex Flow of University of Illinois at Urbana Champaign. For this studies, a unique, narrow (5 mm wide) flume, which allows the behavior of strictly two-dimensional bedforms to be observed and quantified, was developed. Measurement of the morphology and flow fields associated with bedform amalgamation reveals the importance of interactions between the separation zones of the upstream and downstream bedforms, with flow sheltering, shear layer interactions, bedform stalling and leeside erosion being central to the amalgamation process. These fluid dynamic patterns reveal a distinct sequence of stages during bedform superimposition and amalgamation. Based on them a model for this phenomenon was proposed.