Twelfth impact structure discovered in Central Finland
6/27/2018 01:30:00 PM
The crater has a diameter of 2.6 km and it is covered by the Lake Summasjärvi (Summanen), about 9 km south-east of the nearest city, Saarijärvi, and 275 km north of Helsinki. The age of the impact event and the type of the meteorite causing the crater, are still unknown.
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: Jüri Plado]
The discovery is based on earlier geophysical studies of the area by Geological Survey of Finland. As a consequence of the field trip conducted by the Finnish-Estonian research team in 2017, proofs of an ancient asteroidal shock were obtained.
Read more at
https://archaeologynewsnetwork.blogspot.com/2018/06/twelfth-impact-structure-discovered-in.html#e7IpsvezSYRSBljq.99
