Upper Devonian Series

The Upper Devonian Series is the final part of the Devonian Period, spanning from approximately 382.7 to 358.9 million years ago. This geological interval is characterized by significant events in Earth's history, including the continued evolution of life and major geological formations.1

During this time, continents like Laurussia (formed by the union of North America and Europe) and Gondwana (a southern supercontinent) were prominent. The geological record of the Upper Devonian includes widespread marine deposits and terrestrial sediments like the Old Red Sandstone, which document the early colonization of land by plants and vertebrates.23

Life in the Devonian seas saw the diversification of fish, earning it the nickname the "Age of Fishes." The Upper Devonian specifically saw the flourishing of various fish groups, including heavily armored species and the continued evolution of jawed vertebrates. This period also witnessed the rise of vascular plants, forming early forests. The Upper Devonian is divided into the Frasnian and Famennian stages, which are crucial for correlating rock layers globally using fossils like conodonts and ammonites.415