Tomstown Chert












Natural Form:



Description of Physical Characteristics:

Color: Tomestown Chert ranges from beds of bluish gray to a yellowish gray blue, or white with mottling commonly present and nodules of white.

Texture: 

Luster

Translucency:

Silica Fabrics / Fossils: 

Patina: 

Heat Treatment:

Knapping:

 


 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Tomstown Chert is associated with the Tomstown Dolomite Formation of Pennsylvania, Maryland, Virginia, and West Virginia.  Occurs as beds and nodules with primary exposures occurring near Tomstown, Franklin County, Pennsylvania, at the east foot of Catoctin Mountain west / southwest of Frederick, Maryland, a meander belt running from Washington County, Maryland running to the Shenandoah River in Clark County, Maryland, and in Jefferson County, West Virginia.  Grades into the Shady Dolomite Formation to the west. 
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:
Skidmore Island Chert is primarily used during the Paleo period possible due to the decreased ocean levels.