Outline is Representative of Size and Shape:
Name Details:
Identified By:  J. W. House and Thomas R. Hester
Named For:  Carrizo Springs High School Archaeological Society
Date Identified:  1963
Type Site:  Multiple site in southern and southwestern Texas
Point Validity: Valid type

House was a member of the Carrizo Springs High School Archaeological Society.  Hester is a well-respected anthropologist and a Professor Emeritus at the University of Texas – Austin.  Hester has conducted extensive studies in archaeology of Texas.  This type was named in a professional publication and has many professional references.  This is considered a valid type.
Carrizo Triangular
Cluster:
Description of Physical Characteristics and Flaking Pattern:
This is a medium triangular point with a flattened to elliptical cross section.  The blade is primarily excurvate.  The base may vary from slightly convex to straight.  The base ranges from straight to slightly convex with a center basal notch.  The basal corners are commonly rounded.  The base is commonly thinned using short longitudinal flakes.  The flaking is usually fine and has a random flaking pattern.
Size Measurements:

Total Length - 25 to 90 mm (average 40 to 55 mm),  Blade Width - 22 to 38 mm
Commonly Utilized Material:
Additional Comments:

John Haberer notes that exhausted Montell type point can take a similar appearance.  The Montell point is noted for the square "bucktooth" appearance of the stem similar to the second and third picture. 
Distribution:
Distribution Comments:

This point is primarily found in southern Texas primarily in Dimit, Zavala, Frio, and LaSalle Counties.  This point is found with decreased frequency into central Texas.
Age / Periods:

Date: 5,000 - 3,000 B.P.
Cultural Period: Middle to Late Archaic
Glacial Period: Middle Holocene to Neoglacial
Culture:
Age Details:
Similar Points:
Early Triangle, Montell, Tortugas
Other points in this cluster / Related / Associated Points:
Pictures: 

Pictures Provided By:
As Illustrated by Perino, 1968
David Anderson
Don Bickham
Toby Baugus
Texas Arrowheads
 Carrizo Projectile Point, Carrizo Arrowhead
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References: (See Reference Page, Entry Number):

8, 23, 30, 179