Rare fragment of meteoric origin 7.9 gr - mm 46 x 41 x 3 Meteorites Raw Minerals Stones Rocks for Collection, very nice thin section of glass Impactite consolidated melt Bomb or Suevite, gas vesicles rich, only a piece, as in photos.
Fall period: Miocene (14.5 million years).
Included to the Meteorite a geological tab dates paper.
When the Meteorite impacted, it vaporised and liquified the bed rock. Some of this fell as molten glass bombs. This slice is part of one of those glass bombs. It is possibile see the gas vesicles within the gray glassy matrix.
The crater of Nördlingen, (Ries Crater), is located in Germany, and is one of the most popular meteor craters in the world.
The crater of Ries is located in the district of Donau-Ries north of the Danube, in the western part of Bavaria. The toponym "Ries" derives from the name of the Roman province "Raetia". The Nördlinger Ries crater looks like an almost perfectly circular depression and its flat appearance stands out strongly on the rugged landscape of Franconia and Swabia. Initially this geological structure, based on the rocks, in particular the suevites, found inside, was considered an ancient volcano, only in 1960 it was proved that its origin derives from a meteoric impact occurred in the Miocene, about 15 million of years ago, which also gave rise to another meteor crater, the Steinheim crater. The impact created by the Nördlinger Ries also gave rise to the Moldavites. An asteroid, 4327 Ries, was dedicated to the crater.
Impactites consist of pre-existing terrestrial rocks altered and / or merged partially or totally by the very high temperatures and pressures, instantaneous and of very short duration, generated by the impact of a large meteorite, asteroids and comets on the Earth's surface: "targeted" rocks may be of different types, as are the generated impacts. As a result of an impact, new types of rocks (such as suevite and kofelsite) can be created, as well as new minerals, different from the original rocks and minerals because part or all of the included elements have been expelled or destroyed by high temperatures, such as water, crystals or any fossils.
Unfused impacts may contain wedge fractures (shatter cones), varying in size from a few centimeters to over 2 meters.
The minerals that are formed, at least on Earth, only as a result of the impacts of asteroids or comets are: the chaoite, the coexite, the lechatelierite, the maskelynite, the reidite and the stishovite.
The lechatelierite can resemble the trinitite, a molten rock that forms on the subepicentral point of the explosion of atomic bombs.
Meteor impacts can also create glass-like impacts. Normally these glasses take their name from the area in which they are found, such as for example. the glass of Darwin, the glass of the Libyan desert, the irgizites.
Sometimes the asteroid / cometary impacts hurl terrestrial rocks completely fused at a great distance, during their ballistic flight, partly even outside the Earth's atmosphere; these fragments, cooling down, pass through a plastic condition, which shapes the fragments according to the most different aerodynamic shapes.
According to many researchers, the so-called tectites, found in different places on the Earth's surface, form part of these fragments.
A
meteor crater (often called astroblema, impact crater or basin) is a circular depression on the surface of a planet, moon, asteroid, or another celestial body. Craters are caused by meteoroid, asteroid and comet impacts. To designate the craters on celestial bodies different from the Earth with official terminology, the Latin expression crater is commonly used, according to a convention established by the International Astronomical Union.
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