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Evans and 
Meggers] ARCHEOLOGY IN BRITISH GUIANA 
ae ; 
gc LA 
CELL) AK 
OK Ui 246 
= 
Ficure 27.—Stone artifacts of the Mabaruma Phase. a-b, Choppers. c—d, Hammerstones. 
a long rectangular form. The digging edge is irregular, ranging in 
width from 3.0 to 5.0 cm. The high polish from abrasion in the dirt 
extends along the shank of the hoe for as much as 2 to3cm. Dimen- 
sions are 10 to 15 cm. long, 4 to 6 cm. wide, and 1.3 to 3.5 em. thick. 
Knife, polished (fig. 28, ¢).—A large percussion-strike flake of fine- 
grained quartzite measuring 4.6 cm. long, 2.5 cm. wide, and 5 to 9 mm. 
thick has one of the narrow edges abraded on both surfaces to pro- 
duce a straight cutting edge. 
Mano (fig. 29, c)—A fragment of a rubbing stone of granite has 
one surface worn flat from backward and forward grinding motion. 
The other surfaces are broken so the form and dimensions of the 
original artifact cannot be determined. The existing grinding area 
is 6.0 by 3.5 cm. 
