Impact crater lake
Introduction


[thumb\|Lake Manicouagan in [Quebec](/wiki/Quebec "Quebec"), [Canada](/wiki/Canada "Canada")](/wiki/File:Manicouagan-EO.JPG "Manicouagan-EO.JPG")
[thumb\|A satellite photograph of the [Siljan Ring](/wiki/Siljan_Ring "Siljan Ring"). [Lake Siljan](/wiki/Lake_Siljan "Lake Siljan") is a large part of the southwest edge of the much\-eroded crater.](/wiki/File:Siljan_WorldWind.jpg "Siljan WorldWind.jpg")
[thumb\|[Lonar Lake](/wiki/Lonar_Lake "Lonar Lake") in [India](/wiki/India "India")](/wiki/File:Lonar_Lake.jpg "Lonar Lake.jpg")

An **impact crater lake** is a lake inside a depression caused by the impact of a meteor. It is also known as an **annular lake** in cases where the water body is shaped like a ring, as many impact crater lakes are.


How common are impact crater lakes on Earth?