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chondrite Morocco NWA 869 L3-6 (3)

  • Product Code: M23839


Origin : Morocco (North-West Sahara)

Geological era : Paleolithic

Age : about 10,000 years ago

Size : 1.8 gr - mm 18 x 17 x 3

fragment of meteoric origin, thin section, 1.8 gr, mm 18 x 17 x 3, only a piece, in plexiglas box diam. cm 3, as in pictures.
Chondrite NWA 869 - L3 - 6, from individual meteorite TKW (Thousand Kernel Weight) 1,500 Kg, found in North-Western Sahara desert.
Year of fall: Paleolithic (about 10,000 years ago).

Included to the meteorite a geological tab dates paper.

NWA 869 is a rocky meteorite. Fragments of it were discovered for the first time in 1999 in the Algerian desert near Tindouf. The meteorite was called NWA (North-West Africa) 869. So far about 1.5 tons of this meteorite material have been found. The individual fragments look different and some specimens show signs of brecciatura that are not visible in others.
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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