Grinding Stone Item Number: T-052.01 from the The Burke: University of Washington
"a piece of tabular sandstone approximately 24.5 centimeters long, 18.0 centimeters wide, and 3.5 centimeters thick. It has been ground on one surface which also exhibits two parallel grooves 14.5 centimeters long. (Larson & Lewarch 1995: 7-141)."
King County Northwest Coast Pacific Northwest Puget Sound Washington State Western United States Western Washington
One one side it has two parallel grooves that are 14.5 cm long.