Color:
Dactite is most commonly a light grayish white, but may range to a dark
gray
Texture: Fine grain
Luster: Dull
Translucency: Opaque
Silica Fabrics / Fossils: None
Patina:
Heat Treatment: N/A
Knapping: Easily knappable
Notes: Dactite is an intermediate between rhyolite and andesite.
It contains more quartz than andesite and more plaioclase than rhyolite.
Distribution:
Distribution Comments:
Dactite is associated with lava flows, domes, dikes, sills, and
phyroclastic debris. Primary outcroppings are located at the
Cashman Quarry near Ennis, Madison County, Montana.
Projectile point made from this material:
Pictures Provided By:
Do you see information that is incorrect on this
page, or do you have information that should be added? If so, please:
