Color:  Grand Falls Chert is a light gray color and may vary to brown.

Texture: Fine grain

Luster:

Translucency:

Silica Fabrics / Fossils: Braciopods

Patina: Light yellow to brown

Heat Treatment: 

Knapping:  Grand Falls Chert is very dense and brittle and often referred to as a "butcher knife" chert.
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Grand Falls Chert is associated with the Grand Falls Member of the Boone Formation of Southwestern Missouri.  Primary outcroppings occur along Schoal Creek and into Kansas, Oklahoma, and Arkansas.  Occurs in Cherokee County, Kansas,  Otawa County, Oklahoma, and Newton County, Missouri.  Named for exposure near Grand Falls, Newton County, Missouri