Other Websites with Detailed Information:
http://www.lithicsnet.com/lermaroundedbase.htm
Name Details:
Named By
Richard S. MacNeish (Lerma Pointed)
James Cambron (Lerma Round Base)
Named For
Date Identified:  1954 / 1969
Type Site: Canyon Diablo Site, Tamaulipas, Mexico
 Lerma
Cluster:









Commonly Utilized Material:


Date:                   
Cultural Period:   
10,000 - 5,000 B.P.
Transitional Paleo to Middle Archaic
Early Holocene to Neoglacial


Glacial Period:
Culture:
     
      


Outline is Representative of Size and Shape:
Lerma Pointed


Lerma Round Base

Description of Physical Characteristics and Flaking Pattern:

This is a medium to large ovoid point with a flattened to elliptical or diamond cross section.  The blade is excurvate with the widest portion of the blade commonly being below the midpoint.  Some examples have parallel sides.  Serrating may be present.  The blade is generally straight at the hafting region.  The base may vary from convex to having a pointed base.  The hafting area is commonly ground 10 to 30 mm from base.  However, some examples lack any hafting region grinding.  The flaking pattern may vary from parallel or oblique transverse in early examples to random flaking.  This point is made with broad percussion flaking finished with finer pressure flaking along the edges.

Size Measurements:  Total Length - 40 to 104 mm (65 to 75 mm average), Width - 15 to 33 mm (21 to 24 mm average),  Thickness - 7 to 14 mm. 

Distribution:
Distribution Comments:

This point is most commonly found from northern Mexico into Texas, the Mississippi River Valley and into the Ohio River Valley and Tennessee River Valley (red).  This point has infrequently been reported into the yellow section.  Lerma points have been reported in the Tehuacacan Valley, Iztapan mammoth in the Federal Districk of Mexico, at San Nicolas rock shelter in Queretaro,  and associated witht he Lerma Culture of Tamaulipas.  Lerma points have been reported in Venezuela, Ecuador, Peru, and Chile.

Similar Points:
Abasolo, Adena Blade, Agate Basin, Abasolo, Angostura, Burroughs, Catan, Chiconautla, Covington, Datil, Desmuke, Harahey, Guilford, Lermoide, Nebo Hill, North, Pelona, Refugio, Sedalia, Snake Creek, Tennessee River, Tennessee SawZacatenco
Related / Associated Points:
Angostura
Additional Comments:

These points are found over a great area of distribution.  Suhm and Krieger (1954) suggest that these points appeared earliest in southern Tamaulipas and spread northward.  Bell (1958) notes that points found in Texas were consistent with projectile point rather than knifes.  He notes that the symmetry, thinness, and steep edges would make them unsuitable for knifes.  However, throughout Oklahoma and the Mississippi River Valley similar forms tend to be thicker and are more consistent with knifes.  He argues that true Lerma points may be isolated to Texas and Mexico while similar forms outside this region are knifes and may not be a true Lerma point.

Pictures:
Lerma Pointed
Lerma Projectile Point

Lerma Round Base
Other points in this Cluster:
Point Validity:   Valid Type

MacNeish was a pioneering anthropologist who began his career studying the archeology of the Northern Plains and Canada.  He was most notable for his excavations and studies at Tamaulipas Mexico.  This type has been references in professional publications and is considered a valid type.



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Age Details:
Pictures Provided By:

Stephen Cohn
Troy Halliburton
Patrick and Rhona Madden
Wes Christensen
Luke Hall
Skip Hutchison
Western Artifacts
Mike's Tennessee Arrowheads
Kirk Kirk
The Artifact Hunter
Texas Arrowheads





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References: (See Reference Page, Entry Number):

8, 12, 23, 30, 115, 167, 177, 189, 190, W11, W18
Lerma Projectile Point, Lerma Arrowhead