Keyser Chert











Natural Form:



Description of Physical Characteristics:

Color:  Keyser Chert is a mottled gray to brownish gray of black with visible clastic quartz grains.

Texture: Medium to fine grain

Luster:  Waxy to vitreous

Translucency: Opaque
Silica Fabrics / Fossils:  Abundant crinoid columnals
Patina: 

Heat Treatment:

Knapping:

 


 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Keyser Chert is associated with the Keyser Formation of the Helderberg Group of central Pennsylvania.  Primary exposures occur in Blair, Centre, Clinton, Franklin, Fulton, Huntingdon, Juniata, and Lycoming counties, 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:
Archaeological Context: