Outline is Representative of Size and Shape:
Name Details:
Identified By:  Gregory Perino
Named For:  Town in Illinois
Date Identified:  1991
Type Site:  Mackinaw- Aldrich Cache, Mackinaw River, Tazewell County, Illinois.
Point Validity: Site Specific

Perino was a well-respected self-taught archaeologist who was the founder of the Illinois State Archaeological Society.  This point was named in personally published book, but refers to Snyder points found at the Mackinaw / Aldrich Cache in Illinois.  There are no professional references to this as a valid type.  This is considered a site specific type.
Mackinaw /
Aldrich Corner Notch
Site specific
Cluster: Snyders Cluster
Description of Physical Characteristics and Flaking Pattern:
This is a medium to large corner notch point with a flattened to elliptical cross section.  The blade is primarily excurvate.  Deep notches enter the blade from the corners of the preform forming a strong barb that has pointed terminations.  The stem is expanding with a convex base.  The basal corners are sharp.  This point has a random flaking pattern. 
Size Measurements:

Commonly Utilized Material:
Additional Comments:

This type was named for the Mackinaw- Aldrich Cache was discovered on the banks of the Mackinaw River in Tazewell County, Illinois.  These points were originally referred to as Aldrich points after Frank W. Aldrich who collected the points.  They were later referred to as Mackinaw points after the river they were found near.

There has never been any scientific data supporting an age of these points, but they are thought to be a unique style of the Snyder’s point and be related to the Hopewell culture.  There are many differences between this type and the Snyder’s type.  The Mackinaw points are considered fragile, being very thin and of a large size.  The notching is deep.  These points are thought to represent an art form or fulfill a ceremonial purpose because they are too fragile to be used as knifes or serve any real utilitarian purpose.

The Mackinaw point is a local variation of the Snyders point.  This point has the deep notches similar to the Lost Lake type point, and the "dovetail" appearance of the St. Charles point.


Distribution:
Distribution Comments:

This point is primarily found in central Illinois.
Age / Periods:
Date: 2,100 - 1,650 B.P.
Cultural Period: Woodland
Glacial Period: Roman Warm
Culture: Hopwell Culture
Age Details:
Similar Points:
AftonSt. Charles DovetailHeltonThebesWarrick
Other points in this cluster / Related / Associated Points:
Affis SnydersGrandHopewell, MankerNorth Blade RossRoss BladeSnyders
Pictures: 

Pictures Provided By:

 Mackinaw Projectile Point, Mackinaw Arrowhead

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References: (See Reference Page, Entry Number):

23, 30, W2