Blair / St. David Chert









Natural Form:



Description of Physical Characteristics:

Color: Blair / St. David Chert is a moderately translucent chert that ranges in color from a medium gray to dark bluish gray with brownish mottling and grayish streaks.

Texture:  Fine grain
Luster: Waxy

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Primary Source Distribution:
Distribution Comments:

Blair / St. David Chert is associated with the Carbondale formation of the St. David Limestone in Randolph County, Illinois.  Occurs from Jersey County to Calhoun County, Illinois

 

 

Projectile point made from this material:



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References: (See Reference Page, Entry Number):

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Commonly made projectile point from this material:
Archaeological Context: