Grassy Knob

Grassy Knob chert almost completely replaces the limestone in the formation.  This chert forms in thick deposits (Willman 1975) of yellow grey and light olive brown chert.  The weathered exterior of Grassy Knob is brown to grey in color.  There are few to no fossils associated with Grassy Knob chert (Willman 1975).

The weathered exterior on both sides of this piece of Grassy Knob chert was formed over many years.

This piece od Grassy Knob chert is typical of the chert type in that there are no fossils visible.

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Bibliography