Rancheria Chert











Natural Form:



Description of Physical Characteristics:

Color:  Rancheria Chert is porous ranging from gray to brown and weathering brown.
Texture:

Luster: porcellaneous 

Translucency: Opaque

Silica Fabrics / Fossils:  Crinoid fragments
Patina:  Brown

Heat Treatment: 

Knapping:  Good knapping quality

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Rancheria Chert is associated with the Rancheria Formation of eastern New Mexico and western Texas.  Primarily occurring as nodules and beds in the Sacramento Mountains, San Andreas Mountains of New Mexico, Franklin Mountains of New Mexico and western Texas, and the Hueco Mountains of western Texas, and into Chihuahua Mexico.  
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:
This material was a key material used by the Folsom culture in the source area.
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