Formation
The lake is a remnant of a larger body of water which existed in this area during an Ice Age. In the Paleozoic Era, 300–400 million years ago, the entire territory of the modern Gulf of Finland was covered by a sea. Its modern relief was formed as a result of glacier activities, the last of which, the Weichselian glaciation, ended about 12,000 years ago.
Read more about this topic: Lake Peipus
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