Color: Kornthal Chert is a brecciated to conglomeritic material ranging in color from a pinkish gray, to red most commonly, but blue, yellow, brown, and white may be present.  Inclusions of white chert or quartz is often present.

Texture:  Medium to very fine grain

Luster: Dull to waxy

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: Primarily a low to moderate flaking quality, but very fine grain material has a better flaking quality.
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Kornthal Chert is associated with the McNairy Formation of Missouri and Illinois.  Primary outcroppings occur in Union and Alexander counties, County, Illinois.  Occurs into Missouri and Kentucky.  Kornthal Chert is a local chert rarely being utilized outside the source area.