Color:
Cochran Chert is opaque, ranging in color from a medium tan to a dark brown.
It is often banded or mottled, may have a petrified wood appearance. Quartz
inclusion may be present.
Texture: Fine grain
Luster: Waxy to vitreous
Silica Fabrics / Fossils: Generally absent
Patina:
Heat Treatment: Heat treatment produced
a glossy red to yellow color.
Knapping:
Distribution:
Distribution Comments:
Cochran Chert is associated with the upland clays of the Reedstown
Member. Commonly found on ridge tops in western Wisconsin.
Primary outcroppings are found in Buffalo and Trempealeali counties,
Wisconsin and into Minnesota. This is a local chert.
Projectile point made from this material:
Pictures Provided By:\
David Amble
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