Figure 174.—Adz, Type I, thick variety (c. 820):

a, front, well ground, parts of sides showing; b, back, well chipped; bevel well ground, narrow; c, side; thickness marked; longitudinal convexity marked in front, less at back; front lateral convexity causes part of front surface to be seen on the side; sides ground towards lower end; d, cross sections show thickness of butt and blade in upper part.