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Name Details:
Named By: Michael W. Spence
Named For
Date Identified:  1971
Type Site:
 San Miguel Diamond
Cluster:







Commonly Utilized Material:


Date:                   
Cultural Period:   
1,700 - 900 B.P.
Transitional Archaic to Preclassic
Roman Warm to Medieval Warm
Llano Grande culture

Glacial Period:
Culture:
Phase:   
     
      


Outline is Representative of Size and Shape:



Description of Physical Characteristics and Flaking Pattern:

This is a small thick diamond to pentagonal shaped point with a thick elliptical cross section.  The blade is excurvate and beveled on both edges of both faces.  The widest portion of the blade is about the midpoint.  The shoulders range from rounded to sharp and angular.  The stem is contracting with excurvate edges and a base that varies from convex to sharply pointed.  This point has a random flaking pattern.

Size Measurements:   Length - incomplete,  Blade Width - 21 to 25 mm (average 23 mm), Thickness - 8 to 9 mm (average 8 mm) ***Based on small sample size***

Distribution:
Distribution Comments:

These points  are associated with the Llano Grande culture of Sonora, Chihuahua, Sinloa, Nayarit, Jalisco, and Zacatecas.

Similar Points:
Related / Associated Points: 
Additional Comments:

The Trujillo Diamond has the same characteristics as the San Miguel Diamond except that the Trujillo Diamond is thin and the Sam Miguel Diamond is thick (Spence, 1971)





Pictures:



Other points in this Cluster:
Point Validity:  Valid Type




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Age Details:
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References: (See Reference Page, Entry Number):

195
San Miguel Diamond Projectile Point, San Miguel Diamond Arrowhead