The Red Letholith is a fictional approach to a specific type of geological stone, the formation of which will take place after the sixth mass extinction. This rock has a taxonomic kinship to the stone of Adnet or Reichskanzlei-Marmor, which was used in the National Socialist architecture in Berlin, but with an essential difference. The usual sedimental matters such as (in-)organic calcium-carbonate depositions of these red-condensed limestones will be disturbed with a new component: the traces of extinct humans.
Letholith is a hybrid name created for this project, compounding two Greek words Lethe meaning forgetfulness or the mythological goddess of oblivion with whom one of the five rivers of the underworld of Hades is often associated, and Lithos, for stone.