Brewerton

Point Type:  Brewerton                   
Associated Date: 4800 - 4300 B.P.
Morphology:  Corner Notched

Length Point:        
Ave: [ 48 +/- 16 mm]  
Range: [ 24 to 80 mm] 
Example: [ 39 mm]

Width Point:         
Ave: [ 33 +/-  7 mm]  
Range: [ 16 to 64 mm] 
Example: [ 27 mm]

Point Ratio (Width / Length):  
Ave: [.71 +/- .13 ]

Length of Base:      
 (Shoulder to Base)
Ave: [ 8 +/- 2 mm]  
Range: [ 5 to 11 mm] 
Example: [ 6 mm]

Width of Base:       
 (Maximum)
Ave: [ 23 +/- 3 mm]  
Range: [ 14 to 29 mm] Example: [ 21 mm]

Depth of Notch:      
Ave: [6.1 +/- 2.6 mm] 

Base Length/Point Ratio:  
 (Length of Base  / Length Point)
Ave: [.18 +/-  .09]

Base Width/Point Ratio:          
 (Width of Base  / Width Point)
Ave: [.71 +/-  .13]
 
Base Ratio:        Ave: [.35 +/- .12 ]                         	1. Short (<= 0.7)  
 (Base Length                                              	2. Proportionate (> 0.7 & < 1.3)  
   / Base Width)                                         	3. Long (>= 1.3)

Base Form:           1. Convex   2. Straight   3. Concave 
 (Subjective) 

Notch Ratio:       Ave: [.19 +/- .05 ]
 (Depth Notch 
   / Width Point)

Blade Ratio:       Ave: [1.2 +/- .3 ]                 	1. Lanceolate (>= 2.0 mm)
 ([Length Point                                        		2. Isosceles (< 2.0 & > 1.2 mm)
    - Length Base] / Width)                        		3. Equilateral (<= 1.2 mm)
   
Blade Curvature:   Ave: [3.5 +/- 1.8 mm]           	1. Very Convex (>= 5 mm)
 (Cord height of curve                                       	2. Convex (< 5 mm & >= 2 mm)
  from Shoulder to Tip)                                   	3. Straight (< 2 mm & >= -2 mm)   
                                                                     	4. Concave (< -2 mm)
                                                                     	5. Mixed (< -2 mm & > 2 mm)
Shoulder Angle:    Ave: [ 64 +/- 11 o]
 (Angle of Shoulder from   
 Notch Center to Shoulder to Tip)

1993 - Tara Prindle