Calamite tree seed fern white fossil Found in early Devonian deposits

Found in early Devonian deposits in Alnif

Length: 5cm Width: 4cm Depth: 2

Dating from the upper Cretaceous

First appearing in the fossil record around11 million years ago

Ambient sand was incorporated into the crystal structures that form in arid and sandy conditions

Calamite tree seed fern white fossil Found in early Devonian depositsFossilised 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.