Ste. Genevieve Chert
 AKA: Old Blue Chert (Illinois)










Natural Form:



Description of Physical Characteristics:

Color:  Ste. Genevieve Chert ranges from light to medium blue, gray, and black, to olive gray and yellowish gray. Light to dark gray concentric bands are common.  Bluish chalcedony inclusions may be present.

Texture:  Medium to fine grain

Luster: Waxy to glossy

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping: 

Notes:  Nodular Ste. Genevieve chert is smooth, commonly has faint concentric bands, and contains no fossil inclusions; bedded Ste. Genevieve chert may be grainy and contain fossils.

 
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:

Ste. Genevieve Chert is associated with the Ste. Genevieve formation of Illinois, Missouri and Kentucky.  It has primary sources within the Mississippi River bluffs.  Found throughout the southern Illinois Basin.

 

Projectile point made from this material:



Pictures Provided By:
Deb Wagner
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References: (See Reference Page, Entry Number):

Similar Material:
Commonly made projectile point from this material:
Archaeological Context:

Ste. Genevieve Chert was primarily used for utilitarian purposes, commonly bi-faces and simple flaking tools.