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In indigenous villages, women often make the tortillas the traditional way by grinding corn with a rounded pestle on a flat lava stone called a piedra or metate and baking the flat corn disks on a dry, clay platter known as a comal.
With stone roller on metate , she grinds the corn, then grinds again.
Ubelaker has associated such joint modifications in the remains of prehistoric Ecuadorian women with corn-grinding using a two-handed mano and slab metate .
she ground the corn on a metate
Ground or pecked stone tools include hammerstones, anvils, cobble manos, metates , and a possible net sinker.
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