At the Mid-Atlantic Ridge (and other places), material from the mantle is pushed upward and forces the crust apart, this results in continental drift.
... t, but with the tongue curled back) (t, th, d, dh, n) Dental (tongue against teeth, like Spanish) (t, th, d, dh, n) Labial (with the lips[?]) (p, ph, b, bh, ...