Color:  The primary color of Upper Gull River Chert is black or blackish blue with lenticular cream or light tan mottling.

Texture: Fine grain

Luster: Waxy to glossy

Translucency:  Opaque

Silica Fabrics / Fossils:  Colonial corals

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Upper Gull River Chert is associated with the Upper Member of the Gull River Limestone Formation of the Niagara Peninsula primarily occurring as nodules and lenses.  Primary sources are located in southern Ontario, northwestern New York and northwestern Pennsylvania.