https://en.wikipedia.org › wiki › Devonian
The Devonian (/ d ɪ ˈ v oʊ. n i. ən, d ə-, d ɛ-/ dih-VOH-nee-ən, də-, deh-) is a geologic period and system of the Paleozoic, spanning 60.3 million years from the end of the Silurian, 419.2 million years ago (Mya), to the beginning of the Carboniferous, 358.9 Mya. It is named after Devon, England, where rocks from this period were first studied.. The first significant adaptive ...