The Great Lakes Are Geologically Infants Compared to Ancient Rift Lakes
The Great Lakes are geologically young, having formed only about 10,000 years ago after the Ice Age, whereas some of the world's oldest lakes, such as Lake Baikal and Lake Tanganyika, have existed for millions of years. While the Great Lakes are recent postglacial features, ancient lakes in Africa, Asia, and Russia have persisted through vast geological timescales, often due to active tectonic rifting that maintains their basins. This stark contrast highlights that the Great Lakes are among the youngest major lake systems on Earth, with their entire modern history fitting into a tiny fraction of the lifespans of these older, enduring water bodies.