Harrison Duran on Instagram: "New York State contains some of the world’s best localities for Devonian fossils. Today we collected some trilobites which are roughly 360 million years old. Layers of shale which contain many marine fossils, signify that there was a lot of water movement and energy which packed these organisms together. The trilobites do not preserve as well in those high-energy layers as they do in low energy ones. The shale which split in to larger and more structurally solid lay

Devonian in biology

The Devonian Period: The Age of Armored Fish and Seven-Toed Tetrapods

Life in the Devonian: 419 to 359 million years ago