Chepultepec Chert
(Ridge and Valley Chert)













Natural Form:



Description of Physical Characteristics:

Color:  Chepultepec Chert ranges from yellow to white and oolitic  In Virginia, nodules of white and dark gray to black occur.

Texture: 
Hard fine grain, "worm eaten"

Luster: Porcellaneous 

Translucency: Opaque

Silica Fabrics / Fossils: Fossiliferous,  oolitic with rhombic cavities

Patina:

Heat Treatment: 

Knapping: 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:

Chapultepec Chert is associated with the Chapultepec Member of the Knox Formation occurring as beds, thin layers, or nodules with primary sources occur in the Murphrees Valley of Alabama.  In Virginia the Chepultepec Member is associated with the Beekmantown Group and has nodules of white and dark gray to black chert.  Exposure occur in southeastern belts in the Valley of Virginia and in the eastern panhandle of West Virginia. 

Projectile point made from this material:



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References: (See Reference Page, Entry Number):

Similar Material:
Copper Ridge Chert
Knox Chert
Longview Chert
Commonly made projectile point from this material:

Archaeological Context:
Often referred to as "rotton chert" it is very soft and shatters easily.  It has not been found in archaeological contexts.