After a late-glacial readvance, the glaciers in Argentine Patagonia receded quickly, and by 10,000 B.P. at least one glacier was little larger than it is today. Three episodes of postglacial readvance followed, the first culminating about 4600 B.P. during early Sub-Boreal time, the second about 2000 B.P. during the Sub-Atlantic, and the third during recent centuries. In contrast to most other parts of the world, no glacier, so far as is known, reached its maximum postglacial extent in recent centuries.