Color:  Cordell Chert is an opaque dark to light brown or light to medium gray.  Cream colored rod shaped fossils are usually present and may form a vein. 

Texture:  Fine grain

Luster: Waxy to satin like luster

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Cordell Chert is associated with the Middle Silurian Cordell Formation found in Chippewa County, Michigan