Kettle Point Chert
AKA: Ausable Chert, Port Franks Chert / Chalcedony












Natural Form:



Description of Physical Characteristics:

Color:  Kettle Point Chert has an exterior color that ranges from a mottled blue gray to a medium gray with darker grayish banding.  May have a brassy or greenish hue.  Lighter clouds or streaks are present.

Texture:
Smooth fine grain

Luster: Waxy to dull

Silica Fabrics / Fossils: Macro fossils include conodont hash and echinoderm fragments, radiolaria sponge spicules, ernaceous, foraminifera.  Micro fossils include acritarch, chitinozon, and scolecedont.

Patina: Pale red to grayish brown

Heat Treatment:  Heat treatment produces colors of pink and mauve.

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Kettle Point Chert is associated with the Ipperwash Formation Limestone and found just below the Kettle Point Formation Black Shale.  Primary sources extend from the tip of Cape Ipperwash north to Kettle point at Lake Huron.  Exposed beds have been located at roadway cuts in Thedford, Ontario.  Secondary sources have been reported in Ausable Basin and Essex County, Ontario.  (into Pennsylvania)

 

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:
Crawford Knoll


Archaeological Context: