San Francisco Peak Obsidian
(Fremont Peak - Agassiz Saddle)
Description of Physical Characteristics:
Color:
San Francisco Peak Obsidian is
grayish black and extremely vitrophyric with abundant feldspar
phenocrysts and inter-banded with ash. The cortex ranges from a
ashy rhyolite to weathered black.
Texture:
Luster:
Translucency
Silica Fabrics / Fossils:
Patina:
Heat Treatment:
Knapping: Poor
quality knapping material not allowing for controlled fractures.
More vitreous material may have a slightly improved knapping quality.
Distribution:
Distribution Comments:
San Francisco Peaks Obsidian is associated with the San Francisco
Volcanics and occurs as abundant nodules above 3,300m in elevation on
the northwest slope of Fremont Peak near Agassiz Saddle in the Coconino
National Forest, Coconino County, Arizona.
Projectile point made from this material:
Pictures Provided By:
References: (See Reference Page, Entry Number):
Similar Material:
Commonly made projectile point from this material:
Archaeological Context:
Not known in archaeological contexts.
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