Mano
Vesicular Basalt
Circa: Pueblo II AD 900-1150
H 20cm, L 10cm, W 4.5cm
Lake Mead National Recreation Area, LAKE 3480
Mano is Spanish for hand. They were used as a grinding stone to grind foodstuffs, such as corn kernels into a paste or flour before cooking. Manos were used in conjunction with a metate.
References:
National Park Service
http://www.nps.gov/meve/forteachers/artifactgallery_manometate.htm