Color:  Amsden Chert ranges from most commonly gray or blue, but tan is also present.

Texture:

Luster: Dull

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Amsden Chert is associated with the Amsden Formation of northwestern Wyoming and into central Montana.  Amsden Chert is commonly found in nodules in the western Big Horn Mountains and the western end of the Rattlesnake Range Wyoming.