The following photographs were taken in the field, or just while I was at the beach.  Several are simply of the patterns left by flowing water dissipating its energy over an unconsolidated bed.   Most of these patterns are the results of changing current regimes where sets of ripples formed during one phase of the tide are modified, but not completely erased by the subsequent tide or phase.  These bed forms result from many factors, such as steady currents (for example, drainage behind raised beach berms), oscillating currents from waves, and spatial gradients in depth.  Other photographs were taken during nutrient flux studies in salt marshes.  These photographs use traditional silver black and white emulsions, some have been toned in Adobe Photoshop after scanning.