The isopachus rim cements are related to inital freshwater cements dissolved from original aragonite and calcite. The radial calcite ooids accumulated adjacent to the tidal channel seen in outcrop on Rt 64 close to Carter Caves in Kentucky. Note ooid nulceae of crinoid ossicles and echinoid spines. There appear to be a few botryoidal grains enclosed by radial ooid coating. Darkened spots within bioclastic layers are cyanobacteria colonies that cause local micritization. Some grains may have been bored by sponges.