Mazon Creek Fossil Beds - Credit: Wikimedia Commons
Mazon Creek Fossil Beds - Credit: Wikimedia Commons
The Mazon Creek fossil beds are a conservation found near Morris, in Grundy County, Illinois. The fossils are preserved in ironstone concretions, formed approximately in the mid-Pennsylvanian epoch of the Carboniferous period. These concretions frequently preserve both hard and soft tissues of animal and plant materials, as well as many soft-bodied organisms that do not normally fossilize. The quality, quantity and diversity of fossils in the area, known since the mid-nineteenth century, make the Mazon Creek important to paleontologists attempting to reconstruct the paleoecology of the sites.Illinois State Museum-Mazon Creek Fossil Exhibit The locality was declared a National Historic Landmark in 1997.. Read more on Wikipedia
Source: en.wikipedia.org