Burdell Mountain Obsidian











Natural Form:



Description of Physical Characteristics:

Color:  Burdell Mountain Obsidian is a glassy black with many inclusions including felspar.
Texture:

Luster:

Translucency:

Silica Fabrics / Fossils: 
Patina:

Heat Treatment: 

Knapping:  

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution:
Distribution Comments:
Burdell Obsidian is associated with the Tolay Volcanics or the lower Somoma Volcanics.  Outcrops occur on the southwest slope of Burdell Mountain, Marin County, California.
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:
The quality of the obsidian is poor for tool manufacturing and has not been found in archeological sites.  No evidence of prehistoric mining has been located at the source.   Has a unique geochemical trace elements and appearance that would make obsidian from this source identifiable.
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