Figure C20 ASTHENOSPHERE
A hallway grand leads south, all dressed in stone
Of many shades: here is remembered by
Its native rocks, each continental zone
Of ancient time, long hidden from the sky.
Vaalbara’s zircon, Doggerland yet dry,
Basalt slabs from Kerguelen afar,
Granite of Farallón, tormented by
Tectonic might, and lost Zealandia’s bar,
Beneath the southern waves a home to Neptune’s car.