the.com/isostasy
the earth's crust floats on rock like an iceberg, forever bobbing toward balance.
means the geological principle that the lithosphere floats in gravitational equilibrium on the denser, more fluid mantle beneath it.
from coined in 1889 by american geologist clarence dutton from greek isos (equal) and stasis (standing), after surveys of the himalayas showed mountains have deep roots pushing down into the mantle, not just height piling up.
mountains have rootstall peaks sink deep roots into the mantle below
still reboundingscandinavia rises yearly, still recovering from ice age glaciers
explains ocean basinsthin dense crust under oceans sits lower than continents