First signs of primitive agriculture and cattle raising. Cairn graves on hills, typical of the period. Ship settings in the Main Island. A deterioration in climate affects living conditions. At the end of the period population increases again through immigration, mainly from the west.
Settlement spreads over the Main Island.
10th century Dense settlement in the Main Island. Large numbers of farmstead cemeteries and house foundations exist from this period. Extensive trade connections with neighbouring countries. First traces of Christianity emerge. Several churches originate from this period.