Color:  Wapsipsicon Chert is mottled and ranges from a gray to a light tan or brown

Texture:  Medium to fine grain

Luster: Dull to satin

Silica Fabrics / Fossils:

Patina:

Heat Treatment: 

Knapping:  e Upper/Lower Silurian, perhaps from the Scotch Grove Formation. Equally confusing is Grand Meadow chert
 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Distribution Comments:

Wapsipinicon Chert was originally thought to be associated with the Middle Dovonian Wapsipincon Group.  Further research has suggested that it is associated with the Upper/Lower Silurian Group, possibly the Scotch Grove Formation.  It has also been suggested that it is associated with the Grand Meadow Formation of the Middle Donovian which is almost identical.  Further research is needed to ascertain the exact association.  Primary outcroppings have been reported in Cedar River and Lake Macbride in Linn and Jones counties, Iowa.