Claim: The Boggeragh Mountains are located in County Cork, Ireland, and were reported to be formed from the Old Red Sandstones deposit during the Devonian Period (a.k.a "The Age of Fishes" in the Paleozoic era).
Evidence: The Boggeragh Mountains (Irish: An Bhograch) are located in County Cork, Ireland, with the Munster Blackwater to the north and the River Lee to the south of the hills. The mountains were formed from Old Red Sandstone deposited during the Devonian Period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The Devonian (/dɪˈvoʊ.ni.ən, də-, dɛ-/ dih-VOH-nee-ən, də-, deh-) is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, 419.2 million years ago (Mya), to the beginning of the Carboniferous, 358.9 Mya.