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Scottsbluff 9,500-8,000 B.P.
Type I--Long, broad point with somewhat triangular or parallel-sided blades, small shoulders, and broad stems. Type I display transverse parallel flaking that is somewhat irregular. The cross-section is a thick oval. The stem edges are usually ground. Size is between 2 to 5 inches long and an inch wide. Wormington, H. M.
Type II--Points are similar to Type I but have wider triangular blades. In cross-section, they are thin and lenticular. They also have more clearly defined shoulders and short or slightly-expanding stems. Wormington, H. M.