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It was carved from a large piece of Libyan desert glass.
The Libyan desert glass has been dated as having formed about 26 million years ago.
Because of this, they concluded that the sandstone exposed in this feature can be ruled out as being the source of Libyan desert glass.
Ramirez-Cardona and others also suggested that the Kebira Crater might be the source of Libyan desert glass.
Aboud also suggested that if the Kebira Crater is an impact structure, it might be the solution to the mystery about the source of Libyan desert glass.
They found that the mean oxygen isotope values of the sandstone samples from the Kebira Crater differed greatly from their Libyan desert glass samples.
Libyan desert glass (LDG), or great sand sea glass is a substance found in areas in the Libyan Desert.
North of the Gilf Kebir plateau, among the shallow peripheral dunes of the southern Great Sand Sea, is a field of Libyan desert glass.
Most recently, Longinelli and others studied the oxygen isotope and chemical composition of Libyan desert glass and samples of sands and sandstone from its proposed source areas.
Finally, they speculated that this feature might be the source of the yellow-green silica glass fragments, known as "Libyan desert glass", that can be found across part of Egypt's Libyan Desert.
Most tektites are blobs of impure glassy material, but tektites from the Sahara Desert in Libya and Egypt, known as Libyan desert glass, are composed of almost pure silica, that is almost pure lechatelierite.
Instead of proposing that Libyan desert glass was ejected from this feature by an impact, they hypothesized that it was transported from it by a Oligocene-Miocene Gilf River system that contained the Kebira Crater within its drainage basin.
Libyan desert glass (LDG), or great sand sea glass is a substance found in areas in the Libyan Desert.
