Color: Columbus Chert ranges in color from a white to a light gray.

Texture: 

Luster:

Silica Fabrics / Fossils:  Brachiopod, trilobite, brozoan, mollusk, coral, stomatoporoid, and echinoders

Patina:

Heat Treatment: 

Knapping:  NAME: Columbus. SYNONYM: Eversole. TYPE: Chert. DISTRIBUTION: Crawford, Defiance, Delaware, Erie, Franklin, Henry, Lucas, Marion, Paulding, Pickaway, Putnam, Sandusky, Seneca, Union, Wood, and Wyandot Counties. STRATIGRAPHY: Devonian System, Detroit River Group, Columbus Formation. COLOR: White to light gray. COMMENTS: The Columbus formation extends south from Kelley's Island to Columbus.
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Columbus Chert is associated with the Columbus Limestone Formation of eastern and northeastern Ohio.  Primarily found between Lake Erie and Columbus, Ohio.  May be found in Crawford, Defiance, Delaware, Erie, Franklin, Henry, Lucas, Marion, Paulding, Pickaway, Putnam, Sandusky, Seneca, Union, Wood, and Wyandot Counties, Ohio.   Fount into Indiana and Michigan.  Columbus Chert is a common and abundant chert.