Riv. Bas. Sur. 



Pap. No 34/' DEMERY SITE — ^WOOLWORTH AND WOOD 113 



GROUND STONE 



Grooved mauls (19 specimens) : 



Eighteen of these tools were made from oval granite pebbles, with 

 one specimen of fossiliferous stone composed of calcified organic mat- 

 ter. Basically, they are oval stream pebbles modified only by the 

 pecked groove that encircles them. These grooves are centered on 13 

 mauls, but on 6 of them they are offset toward one end. Only one of 

 them has a polished groove. The ends are usually heavily battered. 

 They range in size from 60 X 55 mm. to 135 X 180 mm. ; weight ranges 

 from 1/^ to 9^ pounds, with a mean weight of 4 pounds. 



Diorite celts (4 specimens) : 



Three of these tools are subrectangular in outline and in cross sec- 

 tion, having been fully shaped by pecking and grinding (fig. 21, e). 

 Lengths range from 115 to 145 mm. ; widths, from 55 to 56 mm. ; thick- 

 ness, from 31 to 40 mm. The cutting edges are about the same width 

 as the maximum width, and are blunted from use ; polls are battered 

 from use as hammers. A large piece of diorite, pecked over most of 

 its surface, may be a celt in an early stage of manufacture. 



Pehhle hammerstones (46 specimens) : 



These implements were made from granite and quartzite pebbles, 

 and occur in three forms. Five of them, about the size of baseballs, 

 were made from pebbles which have been battered on all surfaces. 

 Another group of six circular hammers are also battered on all sur- 

 faces, but they are consistently smaller and are evenly shaped. These 

 latter implements are 50 to 65 mm. in diameter. 



The remaining 35 hammers are irregularly shaped river pebbles, 

 tending to be oval in shape. Most of them were battered on one or 

 more faces, and usually on the ends, but none of them were purpose- 

 fully shaped. They range from 30 to 100 mm. in diameter. 



Discoidal haminerstones (8 specimens) : 



These tools are disk-shaped sandstone and quartzite stones ; sides are 

 flat and cross sections are oval. A shallow pit was pecked into each of 

 the flat surfaces, possibly for finger holds, and the entire circumference 

 of each stone is battered. 



Ahraders (61 specimens) : 



Irregular pieces of fine-grained sandstone, scoria, shale, diorite, and 

 granite either have shallow, cup-shaped depressions or flat, smoothed 

 areas on one or more surfaces that suggest they were used as abraders. 



Grooved ahraders (67 specimens) : 



These objects are composed of scoria and medium- to fine-grained 

 sandstone. The irregular width and form of the grooves precludes 



