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The never-ending discovery of Meteorites, brought to you by {name}

Francesco Moser

D'après les dernières études (2013) ,il est très probable que le verre lybique (LDG)a été formé
a la suite de l'explosion dans l'atmosphère terrestre d'un noyau cométaire .
Cet événément a eu lieu il y a 28 millions d'années    +-0.8 Ma   (Oligocéne)
Dimensions :100x75x40mm

Composition;
Sio2       98.42%
Al2o3     1.02%
FeO       0.18%
Fe2O3   0.14%
TiO2      0.13%
Masse volumique :  2.2
Dureté : 6
Indice de réfration :  1.462
Température de fusion :  1700 °C

Inclusions terrestres :
Tourmaline  (elbaite)
Léchiatélliierite Wollastonile
Zircons
Enstatite ( MgSiO3)
Quartz choqué

Des bulles de 0.2mm de diamètre très nombreuses rendent le verre opaque
( c'est le cas pour cet échantillon )

Trainées d'impuretés et de minéraux plus fonçées  (les schlieren) contenant
des élements sidérophiles  ( Fe , Co , Ni ),et de l'iridium.

Pour plus d'informations : https://planet-terre.ens-lyon.fr






Sand desert Egypt Libya, Egypt

Libyan Desert Glass Tektite - Height: 100 mm - Width: 75 mm - 246 g

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Libyan Desert Glass Tektite - Height: 100 mm - Width: 75 mm - 246 g

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