Table 1.

System used to classify projectile points from the midwestern and southeastern United States.

character	character state
I. location of maximum blade width
	1. proximal quarter
	2. second-most proximal quarter
	3. second-most distal quarter
	4. distal quarter
II. base shape
	1. arc-shaped
	2. normal curve
	3. triangular
	4. Folsomoid
III. basal-indentation ratioa
	1. no basal indentation
	2. 0.90–0.99 (shallow)
	3. 0.80–0.89 (deep)
IV. constriction ratiob
	1. 1.00
	2. 0.90–0.99
	3. 0.80–0.89
	4. 0.70–0.79
	5. 0.60–0.69
	6. 0.50–0.59
V. outer tang angle
	1. 93°–115°
	2. 88°–92°
	3. 81°–87°
	4. 66°–80°
	5. 51°–65°
	6. ≤50°
VI. tang-tip shape
	1. pointed
	2. round
	3. blunt
VII. fluting
	1. absent
	2. present
VIII. length/width ratio
	1. 1.00–1.99
	2. 2.00–2.99
	3. 3.00–3.99
	4. 4.00–4.99
	5. 5.00–5.99
	6. ≥6.00

^aThe ratio between the medial length of a specimen and its total length; the smaller the ratio, the deeper the indentation.

^bThe ratio between the minimum blade width (proximal to the point of maximum blade width) as a measure of ‘waistedness’; the smaller the ratio, the higher the amount of constriction.