iyangand ARCHEOLOGY IN BRITISH GUIANA 227 
Motif: The decoration was typically applied in a continuous band around 
or just above the waist of the vessel. The details reflect the character- 
istics of the surface of the palm nut used as a roller stamp. One base 
has a narrow row of stamping around the exterior at the junction with the 
body wall. 
TEMPORAL DIFFERENCES WITHIN THE TYPE: None. 
CHRONOLOGICAL POSITION OF THE TYPE: Onoro Stamped occurs in minor amounts 
throughout the Taruma Phase (fig. 101). 
YOCHO PLAIN 
PASTE: 
Method of manufacture: Coiling ; a number of sherds show coil line cleavage. 
Temper: Abundant, large particles of decomposed granite containing quartz 
and mica, not always well distributed. Particles are typically larger than 
1 mm., frequently reaching 6 mm. (pl. 47, i). No correlation between 
temper size and sherd thickness; temper is as gross in sherds 7 mm. thick 
as in those 20 mm. thick. Hunks of decomposed granite from which this 
temper was derived were found at a number of Taruma Phase sites (Ap- 
pendix, table 29). 
Texture: Poor kneading of the clay has resulted in a striated appearance 
of the cross section and occasional crevicelike air pockets 2-7 mm. long. 
Smaller temper particles give sandy texture. 
Color: Typically bright orange through cross section; rarely, light gray, me- 
dium gray, dark gray, or creamy white. Thinner sherds sometimes 
banded, with medium-gray core fired orange on both surfaces, or with a 
gray band along one surface and orange in the rest of the cross section. 
Firing: Incomplete to complete oxidation. 
SURFACE: 
Color: Cream, light orange, orange brown or brown, the color varying little 
on a single sherd ; occasional black fire clouding. 
Treatment: Variable. Well smoothed and even surfaces, especially on thin- 
walled vessels and griddle interiors. Griddle exteriors may be smoothed 
like interior or left rough and uneven. Pits, scars, and other small de- 
fects remain on surfaces of larger vessels. Occasional coarse smoothing 
tracks on interior parallel to rim. 
Hardness: 2.5-3. 
ForM : 
Rim: Direct, everted, exteriorly thickened or interiorly thickened, with 
rounded, flattened, beveled, or pointed lip. Typically uneven and irregu- 
lar, with the angle of the wall varying considerably on opposite edges of 
the same sherd. 
Body wall thickness: 4-20 mm. ; majority 6-8 mm. 
Body diameter: 18-52 cm. at carination ; majority 22-34 cm. 
Base: Generally poorly finished on exterior, consequently uneven and in 
Forms A and B not well flattened. 
A. Flat, joining sidewalls at angle of 35-40 degrees or 60-65 degrees. 
Thickness may be equal to, greater, or less than body wall. Point 
of junction may be thickened on interior. Diameter 6-20 cm.; 
majority 8-16 cm. (fig. 96, A). 
B. Slight pedestal, formed by a short upslope before the junction with 
the body wall. Height of rise is 3-12 mm. Body wall joins the 
pedestal at an angle of 25-35 degrees or 50 degrees. Diameter is 
6-16 cm. (fig. 96, B ; pl. 47, g). 
