Ground Truth · live core sample · every layer cited
The Ground Beneath You
Name any place on Earth and drill a core straight down through it. Each
layer is a real rock unit recorded beneath that point — its age, its stone, and the fossils
found near it — pulled live from open geological databases. Then trace where that exact ground
sat: a deep-time journey across the latitudes, reconstructed from the plate-tectonic record.
The deep column runs richest across North America; elsewhere you'll strike the surface rock and its age.
Nothing here is generated, and where the ground isn't mapped, it says so.
Name a place, or use a starting point below.
the ground remembers · the collective map
Anyone who drills a core here can leave a mark — a wordless,
nameless record that someone drilled here. This map is every mark ever left, on this
page and on the sibling sky page, drawn live from
the shared archive. A mark stores a 0.1° cell, a kind, and a count — nothing else, and
nothing about you.
drilled the groundlooked up at the sky
reading the archive…
stores the 0.1° cell (~11 km), the kind, a count — no name, no exact point, no trace of you