Outline is Representative of Size and Shape:
Name Details:
Identified By: Michael W. Spence
Named For:
Date Identified: 1971
Type Site:
Identified By: Michael W. Spence
Named For:
Date Identified: 1971
Type Site:
Point Validity: Valid Type
Michael Spence is a distinguished anthropologist who retired Professor Emeritus from the Department of Anthropology, University of Western Ontario. He conducted extensive research in Mexico and Ontario. This type was identified in his publication on cultures of Mexico.
Adams Diamond
Cluster: Description of Physical Characteristics and Flaking Pattern:
This is a small to medium triangular contracting stem point with an elliptical cross section.
The blade is excurvate and beveled on both edges of both faces. The shoulders range from weak to well defined and are at an upward angle. The stem is contracting with excurvate edges and a narrow straight base. This point has a random flaking pattern.
Size Measurements:
Length - 33 to 47 mm (average 41 mm), Blade Width - 13 to 25 mm (average 21 mm), Thickness - 6 to 8 mm (average 8 mm) ***Based on small sample size***
Length - 33 to 47 mm (average 41 mm), Blade Width - 13 to 25 mm (average 21 mm), Thickness - 6 to 8 mm (average 8 mm) ***Based on small sample size***
Commonly Utilized Material:
Additional Comments:
Unlike the San Miguel Diamond and the Trujillo Diamond, the Adams Diamond has a longer and narrower blade (Spence, 1971).
Unlike the San Miguel Diamond and the Trujillo Diamond, the Adams Diamond has a longer and narrower blade (Spence, 1971).
Distribution:
Distribution Comments:
These points are associated with the Llano Grande culture of Sonora, Chihuahua, Sinloa, Nayarit, Jalisco, and Zacatecas.
These points are associated with the Llano Grande culture of Sonora, Chihuahua, Sinloa, Nayarit, Jalisco, and Zacatecas.
Age / Periods:
Date: 1,700 - 900 B.P.
Cultural Period: Transitional Archaic to Preclassic
Glacial Period: Roman Warm to Medieval Warm
Culture: Llano Grande culture
Date: 1,700 - 900 B.P.
Cultural Period: Transitional Archaic to Preclassic
Glacial Period: Roman Warm to Medieval Warm
Culture: Llano Grande culture
Age Details:
Other points in this cluster / Related points:
Innes
Innes
