Graywacke
 












Natural Form:



Description of Physical Characteristics:

Color:  Graywacke is greenish gray with dark specks of felsite and quartz

Texture:


Luster: Dull

Silica Fabrics / Fossils:

Patina: Patina is a lighter green

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:

Graywacke is associated with the lower member of the Georgian Bay Formation.  Primary outcroppings are located in Meadford in southwestern Ontario, but can be found throughout southwestern Ontario.

 

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:
Was used throughout the Archaic period for large bifaces and later in the Woodland period for ground adze and celts.