Coshocton Chert
Upper Mercer Chert variation












Natural Form:



Description of Physical Characteristics:

Color:  Coshocton Flint ranges from a medium gray to a dark bluish gray with bands of various shades of blue.  It commonly has bands of white quartz to cream color and may have orange streaks.

Texture:  Fine Grain

Luster: The luster may range from dull to waxy with a glassy vitreous when heat treated.

Silica Fabrics / Fossils: Fossils are absent

Patina: The patina ranges from yellow to brown or yellowish green

Heat Treatment:  Heat treatment darkens the blues and gives a glassy vitreous sheen.

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:

Coshocton chert is associated with the Upper Mercer Limestone of the Pottsville formation with primary sources being from Hocking County to Coshocton County, Ohio.

Projectile point made from this material:



Pictures Provided By:
Matthew Smith





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References: (See Reference Page, Entry Number):
W23
Similar Material:
Zaleski Chert (Upper Mercer Chert variation)
Nellie Blue Chert (Upper Mercer Chert variation)
Upper Mercer Chert
Commonly made projectile point from this material:
Adena Series, Afton, Ashtabula (most common material used), Big Sandy, Cumberland, Fort Ancient, Kirk Series, Lake Erie, Lost Lake, Madison, MacCorkle, Meadowood, Merkle, Palmer, Stilwell, Thebes


Archaeological Context: