Summanen (IMAGE) University of Helsinki Caption Fig. 1. Left: the location of Summanen impact crater in Finland among the other eleven impact structures. Right: The coastline of Lake Summanen is shown in red. The topographic heights and the lake depths are shown as reliefs: brown depicts topographic hills, green flat terrane and blue deep water, respectively. The crater itself is estimated as broken yellow contour. The impacted rocks have been found in the mainland, towards SE from the centre of the impact. Credit Left side by Jüri Plado; Right side original data modified by JP. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.