Chondrite Texas Briscoe - L5 Meteorites Raw Minerals Stones Rocks Collecting

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51,20€

Product Code: M23862

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Description

Origin : Texas (U.S.A.) - Briscoe County

Geological era : Recent

Age : 1940

Size : 0.2 gr - mm 10 x 10 x 0.5

Fragment of meteoric origin 1 carat - mm 10 x 10 Meteorites Raw Minerals Stones Rocks for Collection, nice thin section half a millimeter, in plexiglas box diam. cm 3, only a piece, as in photos.
Chondrite L5 from individual Meteorite low TKW (Thousand Kernel Weight) 1773 gr, collected in 1940 in Texas (Briscoe County).
Included to the Meteorite a geological tab dates paper.

The Meteorite has a great surface area to weight ratio and it can show nice shock lines with some blobs of metal. So far about 20 kg of this meteorite material have been found. The most abundant minerals are olivine fayalite (Fa26). The meteorite comes from the asteroid belt and is classified as chondrites of class L5 (UCLA), and also as L3. Meteorites of this type were subjected during their formation at high temperatures, between 700 and 750 ° C, and their crystalline structure was partially altered. The chemical composition contains from 5 to 10% of iron.
Many of these meteorites have been classified about 10 years ago and have just sold a few pieces here and there over the years. All listed in the meteoritical bulletin. These pieces are not sold by weight as they are carefully chisen specifically to be characteristics of a specific fall.

The chondrites are meteorites rocks with the same chemical composition of planetesimals, that those small cold bodies that formed in the solar system primordial. The major chemical elements present were hydrogen, helium, carbon, nitrogen, nickel and iron.
86% of the meteorites fallen on Earth are chondrites: they take their name from chondrules present in them. The chondrules are spherules of mafic minerals with small grain sizes, indicative of rapid cooling. The chondrites usually have an age of 4.6 billion years (thus dating the formation of the solar system) and is believed to have originated in the main belt of asteroids. How exactly are formed is still a topic hotly debated among scientists.
Inside them were also found presolar grains, and their isotopic composition is similar to that of the Sun. Is thought that the chondrites are unaltered material in the original solar nebula.

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