Sandstone manos (hand stones) used for milling (seed grinding) at the Sleeper site. The smaller,“exhausted” mano on the left is shown in side view; the characteristic wedge-shaped formed by repeated use in the same task, probably milling grass seeds to make flour or meal for baking. The larger mano on the right is less heavily worn and was probably left behind in anticipation of future reuse. TARL archives.