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Mazon Creek Fossil Beds

Morris, Illinois
County of Grundy.
National Register Number: 97001272
Resource type: Site.
Property type: Landscape - natural feature. The threat level was Satisfactory in
Congressional District: IL-11 Certified Local Government: NO

Statement of Significance (as of designation - September 25, 1997):
The Mazon Creek Fossil Beds are important in the history of U.S. geology. When they were discovered in the mid-19th century, the beds provided the best and earliest representations of the oldest plants and animals known. Sites where fragile fossils are common and well preserved (here in distinctive ironstone nodules) are exceedingly rare. The Mazon Creek beds continue to be a prolific source of fossils.

Comments and questions about the database may be directed to NHL_info@nps.gov