Color:  Crescent Hills Chert are primarily homogenous and ranges in color from purple to red or orange, black and green.  Inclusions are commonly present.

Texture: Medium to fine grain

Luster:

Translucency: 

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping:  Low to moderate flaking quality
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Cresent Hills Chert is associated with the Crescent Hills Basalt Formation of the Absaroka Volcanic Supergroup of Yellowstone.  Primary outcroppings are found south of the Yellowstone River on Blacktail Deer Plateau. .