Commune: Poznań (pow. Poznań, woj. wielkopolskie)
Framework element or context represented:
Primary geological/geomorphological interest:
Seven meteorite craters concentrated within a small area; fragment meteorites are conserved in Polish museums.
Comparative assessment justification:
Meteorite craters are unique in Poland and one of few such type in the world.
Protection status and accessibility:
The site is protected as nature reserve since 1976. It is well accessible by tourist trail.
Character of site: Meteorite craters.
Area: 53.79 ha
Altitude: 153.8 m a.s.l.
Discipline: Geomorphology, Cosmogeology
Process Age: Pleistocene, *all periods
Bedrock Age: *all periods
Description of primary interest:
The area with meteorite craters in Morasko is unique object on the Polish list of phenomena cosmic events. Traces of meteoroid fall are distinctly visible. Within the area of several hundred meters covered with forest, seven craters occur. The largest of them filled by water have a diameter of 100 m and is about 20 m deep. Depressions of different size are surrounded by rims higher of one side, which reflect the direction of the impact from NE. More than 300 fragments of cosmic matter have been found, the largest ones were over 70 kg. Some of them are exposed in museums. The Morasko meteorite represents the type of iron one and belong to the Perseid shower. The impact took place 3-4 thousand years ago. The weight of the falling block is estimated to about 4500 tons but before crossing the atmosphere it was up to 50 times as large. Craters in Morasko were previously interpreted as melt hollows connected with the deglaciation or even with reproduced karst.
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