Color: Bigfork Chert ranges from black to a dark gray.

Texture:  Fine grain

Luster:

Translucency:  Opaque

Silica Fabrics / Fossils: Rare, but fragments of brachiopods, crinoids sponges, conodonts, and graptolites may be present.

Patina: Brown

Heat Treatment:

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Bigfork Chert is associated with the Bigfork Formation of the Ouachita Mountains in Arkansas and Oklahoma.  Primarily occurs as beds of highly fractured chert along eastern part of Sugar Creek Basin, Arkansas.  Named for Bigfork Post Office in Montgomery County, Arkansas.