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Post Info TOPIC: Havero meteorite
Blobrana


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Title: The Haverö meteorite
Authors: G. P. Vdovykin

The meteorite Haverö, which fell on 2 August 1971 in Finland is a representative of a rare, but highly interesting group of stony meteorites-ureitites. Like other ureilites it is enriched in carbon (up to 2%) chiefly represented by diamond and graphite. The meteorite is strongly recrystallised; as a result its chief mineral component-olivine-has been transformed into a mosaic of small grains among which kamacite with an extremely low Ni content (~1.7%) is distributed. Polysynthetic twinning is characteristic of pyroxene grains. The meteorite is penetrated by a system of cavities being stretched approximately in one direction. The cavities are sometimes occupied by kamacite plates containing ~4% Ni. The peculiarities of the mineral and chemical composition of the meteorite indicate that its material had formed during a disequilibrium process. The content of cosmogenic isotopes witnesses to an unusual orbit of the meteorite.

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Blobrana


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Circumstances of fall: It was a bright day and a fireball was not observed. There were numerous reports of noise like thunder or jet aircraft sonic booms. These sounds were said to have been heard "one minute in advance of the big bang". The stone fell through the roof of a storehouse about 100 m from the main buildings on the farm of Tor-Erik Anderssons. It penetrated concrete tiles, llh" boards and the lid of a box on the floor. About five minutes after the fall a nine year old boy playing in the yard showed the farmer and his family where the stone had landed. The stone was said to be "warm but not hot" at the time of recovery. The barn was "filled with smoke but was not on fire" (probably dust). The hole in the roof and position of rest indicated near vertical fall.
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Blobrana


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A small meteorite fell through the roof of a farm building, in Havero, Finland.

The Havero (Ureilite) meteorite fell in Turku Ja Pori, Finland, on the 2nd August, 1971.
A total mass of 1544 g was recovered.

60° 14' 44"N, 22° 3' 43"E



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