6" Cretaceous Petrified Tree Fern (Tempskya) Slab - Oregon

Tempskya is a genus of extinct tree ferns from the Late Cretaceous. They were small to medium tree ferns, growing up to 15 feet (4.5 meters). Their trunks were what are known as false trunks: they were made up of a number of individual stems and petioles growing between adventitious roots. This gives the petrified specimens unique oval and circular patterns.