Mazon Creek

Pecopteris, a leaf type which is not found after the early Permian.
Plants of the Carboniferous swamps.
Lepidodendron was a common plant at Mazon Creek. This is just a branch; it grew to be a large tree.

Mazon Creek is a lagerstätte in northeast Illinois. It is a site of exceptional fossil preservation. It is from the Pennsylvanian sub-period of the Carboniferous, about 309 million years ago.

The area was declared a National Historic Landmark in 1997.[1]

The site's greatest find is the oldest-known beetle.[2]

  1. Joanne Klussendorf (March 30, 1995), National Historic Landmark Nomination: Mazon Creek Fossil Beds, National Park Service. Accompanying photos, from 1912 and 1991.PDF (497 KB)
  2. Bethoux, Oliver 2009. The earliest beetle identified. Journal of Paleontology 83, p931.

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