Color:  Tyler Argillite ranges from gray to dark gray in color.

Texture:  Fine grain

Luster:

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping:
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Tyler Argillite is associated with the Tyler formation of the Baraga Group of Wisconsin and northern Michigan, southern Lake Superior region.