Calamite tree seed fern Miocene Contents may vary from those

Contents may vary from those pictured

circa 95 million years old

Oyster fossil of the species Alectryonia

First appearing in the fossil record around11 million years ago

Western Madagascar

Calamite tree seed fern Miocene Contents may vary from thoseFossilised leaves from the extinct Calamite tree which have been preserved in an ironstone concretion. This two part fossil shows both the fern and its 'negative'. The Calamite was a medium sized tree, growing to around 30 meters (100 feet). Mazon Creek Fossil Beds, Braidwood, Illinois, USA. Carboniferous, circa 309 million years old. Length: 7cm width: 4cm depth: 2cm Measurements are approximate and the minimum size you should expect your item to be.