Fort Union Porcellanite
 AKA: Powder River Chert









Natural Form:



Description of Physical Characteristics:

Color:  Fort Union Porcellanite ranges from most commonly a light gray to a light purple or red.

Texture:

Luster:

Translucency: Opaque

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Fort Union Porcellanite is associated with the Fort Union Formation and primarily occurs in the Powder River Basin of northeastern Wyoming an southeastern Montana.  Has been reported at sites in Alberta.
Projectile point made from this material:



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References: (See Reference Page, Entry Number):

Similar Material:
Commonly made projectile point from this material:
Archaeological Context: