Cobden Chert
Cobden - Dongola Chert
AKA: Anna Chert, Hornstone, St. Louis Ball chert
Description of Physical Characteristics:
Color: Shades of
dark gray to blue-gray which may be solid or have dark gray bands
Texture: Fine grain
Luster: Glassy
Silica Fabrics / Fossils: Uncommon
Patina:
Heat Treatment: Not commonly used
Knapping:
Distribution:
Distribution Comments:
Cabden chert is associated with the Upper St. Louis
Limestone formation and is primarily found in
outcroppings along Big Creek and Clear Creek near Cobden Illinois.
Pictures Provided By:
References: (See Reference Page, Entry Number):
Commonly made projectile point from this material:
Archaeological Context:
