Color: Blackjack Basalt is dark gray when freshly fractured weathering
black, brown, and red.
Texture:
Luster:
Translucency:
Silica Fabrics / Fossils:
Patina:
Heat Treatment:
Knapping:
Distribution:
Blackjack Basalt is associated with the Blackjack Basalt member of the Payette Formation of
southeastern Oregon. Primary outcroppings occur along Blackjack
Butte to the rim or the Owyhee River, Malheur County, Oregon.
Projectile point made from this material:
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