Sediment descriptions from the ponar samples at Hoover Reservoir in Columbus, Ohio.^a

aThe 88 total samples were put into five categories, chosen to best describe the sediments encountered. bQHEI equivalent units are given, but some incompatibilities were noted as QHEI is best applied to streams (as described below). cThe organic-rich clays are not dense and hard as described in the QHEI but fit most closely into the hardpan category. dThe bedrock fragments are gravel in size but are not rounded as in the formal QHEI category.