According to Ars Technica, movement deep inside Earth may help explain how the Great Unconformity formed. The feature involves younger Cambrian layers resting directly above older rock formations, a contact described by Ars Technica as central to understanding the boundary. Ars Technica reported that the planet's churning mantle may have created the Great Unconformity, pointing to processes below the surface as a possible cause for the arrangement.

Source: Ars Technica.