Grassy Knob Chert
The Grassy Knob Chert is a geologic formation in Indiana.
| Grassy Knob Chert Stratigraphic range: Devonian | |
|---|---|
| Type | Formation |
| Unit of | New Harmony Group |
| Underlies | Clear Creek Chert |
| Overlies | Bailey Limestone and Wabash Formation |
| Location | |
| Region | Indiana |
| Country | United States |
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