Mason creek Sphenophyllum emarginatum
€60
This is a very big beautiful specimen of Sphenophyllum emarginatum leaves, a horsetail species, from the famous Mazon Creek Lagerstatten of Illinois.
The Mazon Creek fossil beds are a deposit with exceptional fossil preservation, known as a lagerstätte, found in Illinois. This location of the late Carboniferous age ranks among the great fossil sites around the world.