Corn Grinding Tools Metate (underneath) Chaco Anasazi Trough slab for grinding corn into flour Site number, 29sJ 391, AD 920-1120 Sandstone. L 50.0, W 45.0, T 5.8 cm Chaco Culture National Historical Park, CHCU 29588 Mano (resting on metate) Chaco Anasazi Site number, 29SJ 1360, AD 950-1030 Two-handed tool for grinding corn Sandstone. L 20.7, W 12.4, T 2.6 cm Chaco Culture National Historical Park, CHCU 7041 Corn Kernels Chaco Anasazi Site name, Gallo Cliff Dwelling, AD 1100-1200 9.8 gms Chaco Culture National Historical Park, CHCU 33256