The Mazon River or "Mazon Creek", is a tributary of the Illinois River in the United States, the confluence is near Morris, Illinois.

The Mazon River is associated with the Mazon Creek fossils of the Francis Creek Shale, which are also exposed in strip mines and quarries near the River. This fossil bed includes well-preserved fossils from the Pennsylvanian period of the Paleozoic era and is a world-famous Lagerstätten site.

The Mazon River is approximately 30 miles in length, with the West Fork considered the main branch.

[edit] Cities and Counties

The following cities, towns and villages are within the Mazon watershed:

• Braidwood
• Coal City
• Dwight
• Gardner
• Mazon, Illinois

The following Counties are at least partly drained by the Mazon river:

• Grundy County
• Kankakee County
• Livingston County
• Will County

[edit] See also

• List of Illinois rivers

[edit] External links

• American Whitewater
• Prairie State Canoeists
• Field Museum Collection, Mazon Creek Fossils
• Illinois State Museum, Mazon Creek Fossil Collection
• Prairie Rivers Network
• USGS Real-time Stream Gage Mazon River
• Upper Illinois/Mazon River watershed map (PDF)