Grand Portage Graywacke









Natural Form:



Description of Physical Characteristics:

Color: Grand Portage Graywacke is a greenish gray color

Texture: Fine grain

Luster: Dull

Translucency: Opaque

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Grand Portage Graywacke is associated with the Grand Portage Formation of northeastern Minnesota.  Primarily occurs along the Grand Portage Trail near Puckwunge River.
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: