Libyan Desert Glass rockinaboxlabrea The specimen in the Core

The specimen in the Core Sample was recovered from deposits near Glendive

Colors and patterns will vary widely

Please Note: Sizes and shapes of this specimen vary widely

with estimated ages between 140

This specimen is a fragment of North Pole Dome Stromatolite from Dresser Formation in Western Australia

Libyan Desert Glass rockinaboxlabrea The specimen in the CoreComet impact glass! 28,500,000 years old! Above: Front of the Specimen Card. In the southeastern spur of North Africas Great Sand Sea, there are several fields of luminous, yellow green glass known as Libyan Desert Glass (LDG). Due to the lack of any visible impact crater, the most likely source is a low density asteroid or comet airburst explosion leading to the fusion of silica rich sands roughly 28,500,000 years ago.