Mazon Creek Fossil Plant Concretions Size:Small Above: Back of Specimen Card

Above: Back of Specimen Card

This specimen is a fragment of a knight’s sword dating to the late 13th / early 14th century CE

T-REX (Tooth)

researchers in 2003 discovered that the naturally occurring isotope of the bismuth did in fact undergo alpha decay and calculated a half-life of 1

52" fossil pair from the Tethys Ocean

Mazon Creek Fossil Plant Concretions Size:Small Above: Back of Specimen Card300,000,000 years ago, in the Carboniferous Period, Earth was a dense tropical jungle. Lush forests were home to all manner of prehistoric creatures and swampy landscapes covered the surface. We know of this incredible time thanks to the fossil imprints left behind by plants that were preserved for millions of years. This specimen is a split pair fossil plant concretion that was recovered from Mazon Creek in Illinois. This former coal mine turned