Mazon Creek Bivalve Fossil - Mazonmya mazonesis SOLD 1.87" graptolite a crystal form of calcium

a crystal form of calcium carbonate

Siberia : insights into the Permian-Triassic transition and the Mesozoic evolution of Central Asia

The specimen comes inside a classic

These echinoids first appeared in oceans 450 million years ago

which lived over 440 million years ago

Mazon Creek Bivalve Fossil - Mazonmya mazonesis SOLD 1.87" graptolite a crystal form of calcium300,000,000 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 and animals that were preserved for millions of years. This specimen is a Mazonmya mazonesis bivalve fossil, measuring 1. 87", that was recovered from Mazon Creek in Illinois.