While glaciation of Antarctica began as early as the Oligocene, glaciation of South America and Greenland started only some 14. Ma. Continental-scale glaciation of the Northern Hemisphere began only some 1. Ma in the Late Matuyama Chron, although smaller-scale glaciation was established in Greenland and Iceland at the beginning of the Quaternary. So far, evidence of this early glaciation is largely restricted to North America. The Scandinavian mountains may have been glaciated, but most of Asia was probably still ice free.