Mattoon_Formation
The Mattoon Formation is a geologic formation in Illinois. It preserves fossils dating back to the Carboniferous period.
The Mattoon Formation is a geologic formation in Illinois. It preserves fossils dating back to the Carboniferous period.
This article uses material from the Wikipedia article Mattoon_Formation, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.