LIBYAN DESERT GLASS
Libyan Desert Glass is found on the Libyan-Egyptian border. It is around 26 to 29 million years old. I consider Libyan Desert Glass to be more of an impactite, rather than a true tektite.
ABOVE: A big chunk of Libyan Desert Glass in natural light. Note the yellow-green colour. The sculpture is due to desert weathering / wind-blown sand and is not original.
At the moment I don't have time to do justice to the story, but you can find some great, freely downloadable, references in my bibliography. Also a good introduction can be found at:
ABOVE: The large piece is Libyan Desert Glass in artificial light. The smaller, bubbly piece, is desert sand that has been melted a few years ago by a gas flare. The colours are remarkably similar. You can see more of this artificial glass by clicking here.
ABOVE: Natural wind-blown/sand-blasted Libyan Desert Glass in the Red Zone of the British Museum of Natural History, London. Note the nice conchoidal fracture at the top of the specimen.
ABOVE: A cut piece of Libyan Desert Glass in the Red Zone of the British Museum of Natural History, London.
More to come in the future.............