Manicouagan Crater

ESA Space in Images Title Manicouagan Crater, Canada Released 30/10/2015 10:00 am Copyright Copernicus Sentinel data (2015)/ESA Description - This false-colour image featuring the Manicouagan Crater was captured by the Sentinel-1A satellite on 21 March. Carved out by an asteroid strike some 214 million years ago, this crater in Quebec, Canada is known to be one of the oldest and largest impact craters on the planet. Experts believe that glaciers have since played a large part in its erosion. Its concentric structure results from the shock waves transmitted by the impact. These somewhat resemble the rings that form when a pebble is dropped into water. So big and distinct, the crater can easily be observed from space. The multiple-ring structure is some 100 km across, with the 70 km-diameter inner ring its most prominent feature.