The intial cement appears to be freshwater isopachus rims and meniscus cements related to evaporation of freshwater charged with dissolved aragonite within these aeolian sediments. These grains formed on an exposed carbonate shelf and were transported by waves and wind to their current postion in a now uplifted Pleistocene dune. The aragonite ooids have concentric layering of cortex about bioclasts and micritized pelloid nulceae (some after ooids). Some of the cortex contains evidence of dissolution. Darkened spots within ooid layers are cyanobacteria colonies that cause local micritization.