How can buried glacier ice become part of permafrost?

Buried glacier ice becomes a component of permafrost when blocks of ice from a glacier are covered by sediment or other materials and subsequently incorporated into the perennially frozen ground.1

This process is categorized under the classification of "buried ice," which is one of the five main types of ground ice found within permafrost. In addition to glacier ice, this category includes other forms of ice that become trapped and preserved in the frozen subsurface, such as buried sea, lake, and river ice, as well as recrystallized snow. Once these materials are encased within the permafrost, they remain in a solid state due to the cold climate conditions that define the perennially frozen ground.12