Iron Age Castro Meaning Castle Culture Began Tin Mining in Galicia Spain Because Previously Ice Age in Sierra Ancares

Just north of the northern border of Portugal, at the western tip of Spain, in the land called Galicia, are the Sierra Ancares, a range of mountains as high as 6,500 feet, covered by snow year ’round down to about 4,000 foot levels during the Ice Age which began to end circa 1500 b. c., this the reason that tin mining wasn’t begun there until the time of the Castro culture, when citadel fortresses became the norm and the land was named for Gaythelos, Gaelic, Galicia.