| 词条 | Morasko Meteorite Nature Reserve |
| 释义 |
The Morasko meteorite nature reserve ({{lang-pl|Rezerwat przyrody meteoryt Morasko}}) is located in Morasko, on the northern edge of the city of Poznań, Poland. It contains seven meteor craters. The reserve has an area of 55 hectares (136 acres) and was established in 1976. Natural environmentThe land of the reserve is covered by a forest of oak and hornbeam trees, among which grow a number of uncommon plant species, including[1]
Some uncommon birds can also be found here, including
Impact craters{{Infobox terrestrial impact site| name = Morasko craters | other_name = | photo = | photo_caption = | map = Europe | map_caption = Asteroid impact location in Europe | coordinates = {{coord|52|29|24|N|16|53|47|E|region:PL-WP_type:landmark|display=inline}} | confidence = Confirmed | diameter = {{cvt|100|m|||}} | depth = {{cvt| 11|m|||}} | age = 5 Ka | exposed = | drilled = | imp_size = | bolide = | country = Poland | state = }} The largest of the seven craters on the reserve has a diameter of about 100 metres, and is about 11 metres deep. Five of the craters, including the largest, contain lakes. The date of formation is estimated to be about 5,000 years ago (Holocene).[2][3] The first meteorite found at Morasko was uncovered in 1914 by German soldiers working on the construction of a military fortification. Since then, many further fragments have been found, including one weighing 78 kg in 1956. In September 2006, Krzysztof Socha, a meteorite-hunter from Kielce, working for the Geology department of the city's Adam Mickiewicz University, uncovered with the aid of a metal detector a meteorite weighing 164 kg. At the time this was the largest meteorite discovered in Poland.[4] Analysis showed that the meteorite contained, apart from iron-nickel alloy, a small quantity of silicates (pyroxenes) not occurring on Earth. In October 2012, a meteorite weighing about 300 kg was recovered from a depth of 2.1 m.[5] Adam Mickiewicz University is considering founding an educational centre, to draw attention to the reserve and the subject of meteorite discovery. {{Citation needed|date=June 2018}} Points of note
References1. ^{{cite web | title=The "Morasko Meteorite" Reserve | work=Poznań Multimedia City Guide | url=http://www.city.poznan.pl/mim/strony/turystyka/pages.html?co=list&id=186&ch=564&instance=1017&lang=en }} {{Refbegin}}2. ^{{cite web|title=Luminescence dating of the Morasko (Poland), Kaali, Ilumetsa, and Tsõõrikmäe (Estonia) meteorite craters|authors=Wojciech Stankowski, Anto Raukas, Andrzej Bluszcz, and Stanisław Fedorowicz|url=http://www.geochronometria.pl/pdf/geo_28/Geo28_04.pdf}} 3. ^{{cite Earth Impact DB | name = Morasko | accessdate = 2009-08-19}} 4. ^Jacek Łuczak, Łukasz Cynalewski, "Największy meteoryt w Polsce", Gazeta Wyborcza (2006-12-01), p. 16. 5. ^"Kosmos! Największy w Polsce meteoryt odkryty na Morasku", Gazeta Wyborcza, on-line edition, 2012-10-24 20:38. (link to the news item in Polish). Accessed 2012-10-24.
7 : Impact craters of Poland|Holocene impact craters|Poznań|Nature reserves in Poland|Tourist attractions in Greater Poland Voivodeship|Protected areas established in 1976|1976 establishments in Poland |
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