Description: 2 X 1.75 INCHES AND 7-10 MM THICK WEIGHT 120 GRAMS certificate of authenticity comes with every meteorite I sell muonionalusta Meteorite slab, Sweden, Complete Individual Specimen. great for rings; from Sweden, You can Google quite a bit of history of this meteorite fall. Meteorite, muonionalusta, .15 lbs near arctic circle.ETCHEDMuonionalusta meteoriteThe Muonionalusta meteorite, on loan to the Prague National Museum in 2010. It is the largest meteorite ever exhibited in the Czech Republic.TypeIVA (Of)Structural classificationFine OctahedriteClassOctahedriteGroupIronCompositionNi, Ga, GeCountrySwedenRegionNorrbottenCoordinates67°48′N 23°6.8′EObserved fallNoFound date1906Strewn fieldYes Related media on Wikimedia CommonsThe Muonionalusta meteorite (Finnish pronunciation: [ˈmuo̯nionˌɑlustɑ], Swedish pronunciation:[mʉˈǒːnɪɔnalːɵsta])[1] is a meteorite classified as fine octahedrite, type IVA (Of) which impacted in northern Scandinavia, west of the border between Sweden and Finland, about one million years BCE.The first fragment of the Muonionalusta meteorite was found in 1906 near the village of Kitkiöjärvi.[2]Around forty pieces are known today, some being quite large. Other fragments have been found in a 25-by-15-kilometre (15.5 mi × 9.3 mi) area in the Pajala district of Norrbotten County, approximately 140 kilometres (87 mi) north of the Arctic Circle.The meteorite was first described in 1910 by Professor A. G. Högbom, who named it after the nearby place Muonionalusta on the Muonio River. It was studied in 1948 by Professor Nils Göran David Malmqvist.[3] The Muonionalusta meteorite, probably the oldest known meteorite (4.5653 ± 0.0001 billion years),[4] marks the first occurrence of stishovite in an iron meteorite.The name Muonionalusta is Finnish: it comes from the name Muonio (+ possessive particle -(o)n-) and alusta, which in this context means "a place below", i.e. downstream from Muonio.Description[edit]Studies have shown it to be the oldest discovered meteorite impacting the Earth during the Quaternary Period, about one million years ago. It is quite clearly part of the iron core or mantle of a planetoid, which shattered into many pieces upon its fall on our planet.[5] Since landing on Earth the meteorite has experienced four ice ages. It was unearthed from a glacial moraine in the northern tundra. It has a strongly weathered surface covered with cemented faceted pebbles.CompositionNew analysis of this strongly shock-metamorphosed iron meteorite has shown a content of 8.4% nickel and trace amounts of rare elements—0.33 ppm gallium, 0.133 ppm germanium and 1.6 ppm iridium. It also contains the minerals chromite, daubréelite, schreibersite, akaganéite and inclusions of troilite.[3] For the first time, analysis has proved the presence of a form of quartz altered by extremely high pressure—stishovite,[3] probably a pseudomorphosis after tridymite. From the article "First discovery of stishovite in an iron meteorite":[2]Stishovite, a high pressure polymorph of SiO2, is an exceptionally rare mineral...and has only been found in association with a few meteorite impact structures.... Clearly, the meteoritic stishovite cannot have formed by isostatic pressure prevailing in the core of the parent asteroid.... One can safely assume then that stishovite formation (in the Muonionalusta meteorite) is connected with an impact event. The glass component might have formed directly as a shock melt....
Price: 269.95 USD
Location: Malone, New York
End Time: 2024-09-07T18:47:54.000Z
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Restocking Fee: No
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All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
Country/Region of Manufacture: Sweden
